Frequently Asked Questions

  • What is the frame made of?

    The GT-427 frame is made of 2”X 4” rectangular square tubing. No welding is required. All components such as suspension & drive line are simple bolt on.
  • Is a square tube frame better than a round?

    Yes. All mass produced vehicles use “C” or boxed frame rails for their chassis for a number of reasons. The boxed steel has four right angles. These gussets give the frame it’s strength. Since the frame needs to be the strongest in a lateral twist, the top and bottom walls are twice as wide as its side walls, (2”x4”). Unlike the square tube, round tube is equally strong in all directions. This is why it is used as a roll cage in race cars. Since the point of impact is unpredictable, round tube makes a great protection structure like those used in Stock cars. A Stock car’s frame, however, is 2”x4” boxed tube.
  • How strong is your GT-427 frame?

    The GT-427 frame has been torque tested by Taylor Race Engineering, a Formula One design team. The frame required 1,250 lbs. of pressure to flex it a single degree of deviation. The maximum amount of horsepower has not yet been determined. Customers have exceeded 700 HP on countless occasions with absolutely no frame flex.
  • Why do some frames look stronger than others?

    Terrific question. Most people who see photos of frames with 3 dimensional sub structures usually assume it is stronger and safer. In most cases this is the impression desired. In other cases, the body is simply not structurally rigid enough to support itself. Most sub frames are made of ¾” thin wall box tube. This is not what the bumpers should be bolted to nor should it be confused for a safety structure.
  • How close is the GT-427 to the original dimensions?

    The GT-427 dimensions are identical to the original roadster except the wheelbase. We extended the wheel base 4” which allowed us to correct a great number of issues associated with those made of the original wheel base which is 90”. The transmission tunnel has been narrowed, and suspension travel has been increased making for a smoother, more comfortable, and more controllable driving experience.
  • Do all GT-427 Roadster replicas handle the same?

    No, they do not. They may all look very similar but do not perform equally. Some are designed for street driving while others for racing. Suspension is very important on a GT-427 Roadster. They are very light and short wheel based in comparison to the average production sports car. UCC has experimented with several different types of suspensions. We chose to use the 4-Link & Panhard bar setup because of its high reliability and performance given the design characteristics of the original.
  • What are the differences between the 4-link setup and the more commonly used Mustang 5.0 suspension?

    The fox body style Mustang 5.0 is equipped with a triangulated four arm setup. This means that only two arms are in-line with the frame and two are angling in towards the 3rd member, or “pumpkin”. The two outer arms are very long leaving only one location for them to bolt, beneath your seats. This makes lowering the seat pans impossible. The Mustang 5.0’s rear suspension is notorious for wheel hop problems. This became noticeable when its HP was increased from its stock configuration. When this suspension is installed into a vehicle that is 1,000 pounds lighter and over a foot shorter the wheel hop is even more pronounced. Sure, upgrades are available to lessen the hop but will not eliminate it completely. At best the upgrade will get it back to the stock Mustang level and you out an extra expense. If you exceed the stock HP of the 5.0 which is 225hp the wheel hop problem will intensify even with the upgrades. These are more than enough reasons for our engineers to keep their distance form Mustang suspension.

    The 4-Link setup consists of four bars, two on each side, on top and bottom that run in parallel to one another. A fifth bar is added called a Panhard bar. This bar runs horizontal to the frame. 4-Link suspension has been used for over 50 years in all types of high performance cars. It has become the standard suspension on most all drag racing vehicles due to optimization in traction. The 4-Link suspension is designed for one purpose, traction! To gain the most traction possible the rear end must not be allowed to move in any direction except up and down so that equal power can be delivered to both tires at the same time. The Panhard bar serves one purpose as well. It prevents the rear end from shifting side to side while allowing the 4-Links to move up and down freely. 4-Links develop enormous amounts of traction in a very simple way. As quickly as the power from the engine reaches the differential, the rear end tries to tilt and the 4-Links immediately bind and plant the power to the pavement. All of this takes place very smoothly in a fraction of a second.

  • What type of front suspension is used on you GT-427 Kit?

    Custom tubular upper and lower control arms have been designed specifically for the GT-427. They use Kevlar coated screw in ball joints and Delrin bushings. Adjustable coil over shocks are used front & back. You will not experience bump steer with this suspension as found in Mustang 5.0 front suspension. Like wheel hop, Bump-Steer kits are available but will not completely eliminate the problem. Our philosophy is simple; why reinvent the wheel? Just go with what works.
  • What type of steering is the GT-427 setup for?

    The frame is set up for a manual rack & pinion. We recommend you use an Ididit Inc. steering column. They are pre-wired and come with tilt wheel.
  • Is non-power steering difficult to steer?

    This is a great question! The answer is no, it is not difficult to steer when the correct rack & pinion is used. Too many times we have seen those who have used a Mustang 5.0 power assisted rack & pinion without the power. This is the process in which one loops the fluid hoses so that the rack is no longer powered. The problem with this is the steering gear box was designed to be hydraulically power assisted. If you have ever tried to steer your car with the motor turned off you know for a fact that it becomes extremely difficult to steer. A rack designed for non-power assisted steering has a much higher geared steering box allowing steering to be comfortable. When a thousand pounds is removed from the equation, steering becomes that much easier. So far our current steering set up has been performing beautifully!
  • How are doors mounted?

    Each door is bolted via six bolts into a solid aluminum hinge that is almost 5” thick. This hinge has brass internal bushings to give it a very smooth action. The hinge is adjustable at both ends. The hinge is bolted to a sub structure called a cowl bar. This is an extension of the chassis that has been recently incorporated into the frame which supports the steering column, windshield, door hinges, and wiper motor.
  • What engines do customers most commonly install in their GT-427?

    Any small or big block Ford or Chevy V8 can be installed in the GT-427 frame. Most of our customers install the Ford 351 Windsor. Simply specify what engine you plan on installing so that we can include the correct headers and motor mounts.
  • What engine do you recommend for the GT-427?

    For extensive driving, a small block would be recommended. It is much tamer in traffic and performs excellent being a light weight motor. It has a better weight distribution with a small block. You will have tremendous fun and success at the track with a small block over a big block motor if racing is a consideration. If your driving is based on stop light to stop light, big blocks are very fun. They produce tremendous amounts of low end torque. As far as horse power goes, a small block can produce the same amount of power as the big blocks making for a lighter, faster car.
  • What is the body constructed of?

    UCC uses Vinyl Ester resins, in a hand-laid tri-axial pattern. Most replica bodies are made of Polyester fiberglass, a prehistoric form of fiberglass used in the early Corvettes. Vinyl Ester resin is stronger, less likely to delaminate, more flexible, lighter, and resists blistering that poly resins are prone to. Vinyl Ester has almost double the heat tolerance, which means your paint job will never have ripples, spider cracks, or surprise bubbles. These problems are common on Polyester based fiberglass around engine and exhaust areas. Your paint will last a great deal longer with Vinyl Ester. Our customers’ cars still look brand new after having been exposed to fourteen plus years of Texas’s triple digit temperatures. Peterbilt has recently begun using Vinyl Ester in their truck rigs for many of these same reasons.
  • Are rear ends available through UCC?

    Yes. UCC offers completed 9” Ford rear ends as well as traction lock rear ends. Both rear ends come fully assembled with 11” disc brakes with a standard gear ratio of 3.70. Other ratios may be available upon request depending on availability.
  • Is Kevlar a better material than Vinyl Ester?

    Not at all. Keep in mind that those who offer Kevlar are constructing their body out of Polyester first and then reinforcing it with a thin amount of Kevlar. We began using this same process ourselves until we experimented with Vinyl Ester. After testing we converted immediately.
  • Are the hood, trunk, and doors double-lined?

    Yes. The hood, trunk, and doors are finished equally on the top and bottom surface. Metal plates with six threaded studs each have been permanently mounted inside the doors, trunk, and hood for ease of installation.
  • How do UCC's parts compare to others commonly used in other GT-427 Roadster replicas?

    UCC uses only well known & respected name brands to ensure the best product quality and performance. This allows UCC to extend a warranty to its customers. Our list of trusted name brands is long and worth taking a look at.
  • Are there any guarantees behind the products?

    We guarantee the quality of every part sold. All parts include the parts suppliers warranty from the date of purchase.
  • What is the average curb weight of a GT-427?

    With a small block it will weigh around 2,250 lbs. A big block will weigh about 2,450 lbs. The weight numbers can vary based on accessories. A high performance 351 could weigh as much as 280 pounds less than a big block.
  • What type of build information is provided with the kit?

    The GT-427 kit includes a comprehensive 100 plus page CD-ROM with illustrated photos. The assembly CD is made in Adobe Acrobat as a PDF program. This program allows you to jump to whatever page you wish instantly. If you do not own a computer a printed color copy will be provided instead. A toll-free tech line is available if ever you wish to speak to a UCC technician. Here on the UCC website there is a forum dedicated to our customers. The forum allows you the opportunity to converse with other customers who are building or have built a GT-427.
  • If I have never built a replica before, or restored a car, how long can I expect the build to take?

    On average our inexperienced customers have spent around 140 hours building their GT-427. This time can be cut in half if you have a friend or family member help.
  • Can someone who is not an electrician wire this replica?

    Absolutely! The wiring harness is made by Painless Performance Products. The name says it all. Every wire has been titled leaving no questions about where they go. Printed right on the wire it will say [Engine Section] Pos. to Alternator. It really cannot get any easier than this.
  • What driver/passenger protection is present in the GT-427?

    A lot of protection has been incorporated into the GT-427. The center section of the frame has solid steel pans that extend forward over 10” beyond your feet. Dual side beams run through the doors with a D.O.T. approved double latch mechanism. Front & rear bumpers are chassis mounted. The fuel cell is a 17-gallon collapsible Poly Ethylene fuel cell that is boxed in and protected by the 2”X4” frame. The windshield posts and roll bar is chassis mounted as well.
  • How long is the average lead time from when I order a kit?

    The average lead time is three business weeks. We do not believe you should have to wait three months for your dream machine to make it into your garage. Please call for an exact time considering some months of the season are busier than others.
  • Are customer reference numbers available?

    Yes. Just let us know where you live so that we can locate one of our customers nearest to you.
  • Is welding or fabricating of any kind required?

    None what so ever. Our kit is designed specifically for average garage tools. There are some tools that quicken the build process.
  • Can everything be purchased from UCC to build my GT-427?

    Yes. The basic GT-427 kit includes everything needed except the drivetrain, wheels, tires, rear-end and paint. All of the items you may need are available through UCC.
  • What makes up the exhaust system?

    The headers are made to mate with the engine you have chosen to install. They are four into four 1 ¾” tubes that are Mandrel Bent. The Side pipes are made in the same method as the headers. Each side pipe is 3” in diameter with a 4” muffler. These side pipes are D.O.T. legal in every state.
  • What type of heat shielding do you recommend for the foot box?

    We do not recommend you use any at all. There is no need for heat protection in a UCC body. The foot box/firewall is made of thick Vinyl Ester fiberglass which is very heat reflective. Heat problems are consistent with metal foot boxes due to their closeness to the headers.
  • Why is all of this so important?

    So that you don’t lose to a Civic at a stop light because you have twice as much HP and not enough traction.
  • What type of deposit do you require?

    Orders require a $2,000 deposit. The purpose of a deposit is to show commitment. Several man hours go into the manufacturing & preparation of one’s kit. This deposit is refunded back to your kit balance. We accept bank wire transfers, Visa, MasterCard, Discover, personal, & certified checks. Final payment must be made via-certified bank check or wire transfer at minimum of 10 days prior to estimated kit readiness. We do not accept credit card payments over $2,000 per kit purchase. There is a 4% surcharge for using credit cards for anything other than the down payment.
  • What kind of "after sale" customer service can I expect?

    We have always offered more than is expected. In 1998, UCC/Lone Star Classics was awarded the DuPont Registry Award of Excellence. In 1999, UCC/Lone Star Classics was awarded Manufacturer of the Year by the Association of Handcrafted Automobiles or AHA, the highest honor in the business. As Texans like to say “It’s better to hear it straight from the horse’s mouth” so contact us for customer reference numbers in your area. Our Toll-Free line is dedicated for sales and tech calls. We believe that you should not have to pay in order to receive information or tech help. The UCC team will do whatever it takes to help you build and complete your dream car.
  • How do I title my car?

    We have gone to great lengths to make this as easy as possible. UCC is a certified Automotive Manufacturer. Each kit is assigned a VIN # from a pre-determined list. Each kit also includes a Manufacturers Statement of Origin, or M.S.O. You will simply give this official document to your local Department of Motor Vehicles. They will send it in and turn it into a title in your name. If you are a Texas resident you do not have to do anything. UCC will do all of this for you.
  • How much garage space is required to build a kit?

    Two garage spaces would be ideal. If only one is available you will need to either suspend the body above the frame while you work on it or store the body outside. Many customers have temporarily stored their body in their back yard. The weather will not hurt it. If you have all of the necessary parts the frame can be ready for the body in as little as 2 or three days from the start of your construction.
  • If I am 6'4" can I be comfortable in your GT-427?

    Most definitely! UCC has addressed this issue in many ways. The door has been slightly lengthened for better entrance and exit. The frame has 4” dropped seat and pedal pans. The wheelbase has been lengthened an additional 4”. The transmission tunnel has been narrowed by 8” putting your feet in front of you and not crammed to the left. These changes will keep your knees away from the door hinge and the dash. This extra 4” allows for tilt wheel. You will not find a roomier replica.
  • Is there any additional interior items needed for completion that is not included in the GT-427 kit?

    No, the interior kit includes everything necessary to finish off your interior. It has been pre-upholstered and pre-formed for ease of installation. We have even taken the liberty of including the carpet padding and trunk carpeting.
  • What is the largest tire that will fit in the back of the GT-427?

    The largest wheel and tire that will fit is a 17”x11” rim with a 335- 35 R17. Most of our customers have been using 17”x10” rims with 315-35 R17. They are easier to come by and less expensive.
  • What lug pattern is UCC's brakes setup for?

    All brakes offered by UCC are 5” on 4. 5” lug pattern. This is the most popular lug pattern used in aftermarket wheels.
  • How roomy is the trunk?

    The trunk is one of the largest available in a GT-427 Roadster. Thanks to a specially made fuel cell the trunk can keep a spare tire as large as a 17”x8” with a 245-40 R17 tire and still have room for stow away.
  • What donor car is the fuel tank from?

    The GT-427 does not use donor car parts! The GT-427 kit includes a custom fuel tank made of Polyethylene. This tank is molded to perfectly fit within the rear 2”x4” frame rails. The GT-427 tank has been designed to collapse and deform in the event of a rear impact and not rupture. The tank fits in between the rear bumpers to prevent the bumpers from stabbing in to the tank from an impact. The tank is also made to be aesthetically pleasing from the back/side view of the car. The tank is very difficult to see without crawling beneath it.
  • Are changes ever made to the design of your kits?

    Yes. Our R&D team is constantly analyzing areas to upgrade. They push our cars as hard as possible on and off the track constantly looking for new areas to improve on. The GT-427 product line keeps evolving each year with design features that are interchangeable with previously constructed cars. And, no, there are no available positions in the R&D team. You couldn’t get these guys to quit if you tried!
  • What type of brake system is included?

    Two of the three master cylinders included operate your brakes. They are made by Wilwood Engineering. While one master cylinder is operating your front brakes the other is operating the rear. Brake pressure can be adjusted front to back at the pedal assembly.
  • What donor car does the pedal assembly come from?

    The GT-427 does not use donor car parts! The pedal assembly is custom made for your GT-427. It can be placed in a number of locations in the foot box to totally accommodate your desired pedal location.
  • In what form is the kit in when I arrive to pick it up?

    A trailer ready kit consists of a frame, body, protected headers/side pipes, and approximately 20 boxes. The body will be sitting on the chassis with most of the boxes sitting in the engine compartment, cockpit, and trunk. Every part is shrunk wrapped individually and bubble wrapped if protection is necessary prior to being put in the box. Each box is then shrink wrapped for water protection. The contents of each box are externally labelled.
  • How are replicas affected by resale value?

    Another great question. First, one should understand what effects contribute automotive resale values. They are affected by popularity, reliability, and condition. When an automotive company changes the style of one of its models the resale value of its predecessor drops mostly due to popularity.

    CNN/Money advertised a Kelly Blue Book 2004 resale report listing vehicles that carried the highest resale value. The most retained value was 52% in a 5-year-old vehicle. The GT-427 body style is the same as it was the day we first produced one 14 years ago and will look the same 14 years from now. This allows its popularity to only increase in time. Consider this: a replica is generally kept in the garage. Owners generally take better care of their replica than their daily driver. When was the last time you saw someone wipe every bug off of the front of their car?

    If the frame was powder coated it cannot rust. This only leaves the drive train, seats, and tires. If you used a new or rebuilt engine it should still be in like new condition and the seats and tires can easily be replaced if they show wear. Since it is worth a lot more built you will probably sell it for more than you purchased the kit for. What car can you buy that will pay for itself in 5 years? This wouldn’t be the case of course if you started out with tired Mustang parts. Generally, it is very difficult to find UCC GT-427s for sale. Our customers hang on to them and many return to build another.

  • Why do some companies push I.R.S (Independent Rear Suspension)?

    The Ford 9” is world renowned as the strongest rear end ever made. It is used in drag racing where axle stress is the greatest and in NASCAR racing where long periods at high speed can be the most brutal. The Ford 9” has a pinion offset which creates clearance problems with the drive shaft. If the drive shaft is too short it will be at too great an angle at full suspension travel. The u-joints cannot operate at this angle. If the rear suspension movement was restricted to be within tolerances the suspension would only travel 2” up or down resulting in a very rough riding roadster. Standard length replicas are too short for the straight axle rear-end so they prefer the I.R.S. Since UCC’s GT-427 chassis is 4” longer this is NOT a problem. We can provide you with an Independent Rear Suspension but you will get better traction from our 4-Link.
  • Is a double-sided roll bar available for the driver and passenger?

    Yes. We offer three types of roll bars. The standard roll bar has three legs. An upgrade is available for a passenger side roll bar or a double sided bar that goes all the way across. We recommend the double sided roll bar. It does not have the two inner legs increasing rear view visibility and over all better appearance.
  • Can the roll bars be lowered?

    Yes. When you place your order please let us know if you desire a 2” shorter roll bar. It is no additional cost.
  • Is right hand drive available?

    No. You could make it right hand drive by installing a right hand drive rack & pinion. No one has tried it with one of our GT-427s but we see that it would be possible.
  • What transmission will fit in the GT-427?

    World Class T-5, Tremec TKO 5-speed, Richmond 4-speed, T-56 6-speed, Top Loader 4-speed, C6 &C4 automatic.
  • Do I have to use that long reverse mounted shifter handle in the GT-427?

    No. Since the engine is 4” further forward the shifter is now in the position it should be in. The original’s bent forward shifter handle was a solution to a design problem. The problem was obvious when you attempted to shift into a 2nd gear when your elbow hit the rear wall before the gear could engage. So they simply bent the shifter forward about 8”.
  • Can I order parts to replace my body or frame if ever needed?

    Yes. We can provide you with sections of the body, replacement doors, trunk, and hoods, as well as sections of the frames all at a very reasonable price.
  • Do you offer any labor options for the kit?

    Yes. One can request the hard lines for the brake and fuel to be pre-bent and flared. The body holes can also be pre-cut.
  • What tires do you recommend?

    We recommend a very soft tire. For 17” wheels. Kumho offers good soft tires that are street legal. Another great tire is a Good Year Eagle F1. They are a little more expensive but perform and look the best. For 16” wheels we recommend BF Goodrich 295 50 R16s. For 15” we recommend Good Year Eagle GT IIs with 295 50 R16s.
  • Does the body need to be painted once built?

    Yes. The body should be painted once it has been built. The gloss black gel coat serves as the base for the paint.
  • How difficult is your body to paint?

    UCC’s body has been considered the finest in the industry. The “Complete Guide to Cobra® Replicas” used the UCC body as the example of the way a replica body should be. Only slight sanding is required prior to paint. We recommend a professional painter that has experience painting fiberglass. They seem to do a better job than a strictly metal painter. If you are not going to be painting the car it is highly recommended that you not do any body prep. You may end up costing yourself more money instead of saving. Painters are basically artists. Artists generally like to start with a clean canvas, not one that someone has already been outlined for them.
  • What is the average paint job cost?

    The cost of a paint job is highly variable depending on the type of paint and whether you are building a daily driver or a show car. UCC can paint your car for approximately $8000.00. Those customers with painting experience have done the job the selves. Paint costs can near double on other replica bodies if molds are not changed regularly. UCC frequently replaces its molds to reduce flange lines and other imperfections caused by extensive mold usage.
  • How many seams does the body have and how tall are they?

    The GT-427 has only 3 body seams. These seams are surface seams only. Body seams are casting lines left from the surface of the mold where it separates. The GT-427 seams are flush to the surface of the body. Look out for bodies with tall seams that can be as much as ¼” tall!
  • How do I obtain insurance for my replica?

    First check with your current insurance provider. Some will carry replicas and some do not.
  • Is shipping available?

    UCC does not arrange shipping. However, we will recommend shippers to you that we have come to trust. In addition, we will provide your shipper of choice with crate specifications. All parts weighing less than 150 pounds are shipped to your door through FedEx Ground services.
  • Can I upgrade parts on my GT-427 after it has been built?

    Yes. Many parts can be upgraded or added after your GT-427 has been built such as: bumpers, seats, shocks, oil coolers, stainless steel nose shrouds, steering wheels, side wind wings, heaters, and wheels.
  • Can a stereo be installed into a GT-427?

    Yes. A radio box is available that fills the space between the transmission tunnel and dash that can accommodate a CD player. Speakers can be mounted in a number of places.
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