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How to Build a NASCAR Stock Car

By Contributor

"The days of starting with a production car and converting it to a race car are long gone," says William Burt, author of "Stock Car Race Fan's Reference Guide." NASCAR has specific rules that dictate how a Winston Cup Car can be made. Most of what you see on the stock car is hand built. Here are the steps you should follow to build your very own NASCAR stock car.


Select an old car, of any make and model and break out all the glass in the vehicle except for the windshield. Remove the fuel tank and deposit it far away from the work site. Do not spend a great deal of money on this old car. The majority of it will be destroyed anyway.

Create the roll cage using round and square steel tubing. Make sure it is large enough.

Weld firewall and floor panels. Make sure these are done smoothly and correctly. These panels could mean the difference in life and death in the event of an accident.


Weld a flat sheet of metal to the car using NASCAR templates. Make sure the templates you use are of NASCAR origin and not a spin-off with improper measurements.

Sand the seams so the car is one piece and smooth. Jagged seams can be dangerous to the drivers and mechanics.

Prime, paint and add decals. Decals should include headlight decals, the car make decals (Chevy, Ford, Dodge), as well as sponsorship decals. The headlights and taillights should be covered with aluminum duct tape. The only glass in the car should be the windshield.


Remove all front bodywork, the radiator and engine/transmission unit. Place these away from the work site.

Build or purchase a 340 cubic inch V8 motor. It is usually more cost efficient to buy one of these motors and tune it to your specifications.

Ease the motor into the area left vacate by the removal of all the insides of the car. Depending on the space that is left over, you may have to weld on or take away some metal. You want the motor to fit snugly, but not too tight or loose.

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Use a treadless tire with inner liner. These can be purchased at tire dealerships. It is not a good idea to buy used tires for this instance. You may experience a blowout or flat because they are not in the best of shape.

Make sure the tires you choose fit the chassis and not rubbing the fenders.

Inflate the tires with nitrogen instead of air in the tires to insure less moisture content.

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