For '37-41 Willys coupe with an extended wheel base of 104". For best fit, assemble the main cage and rear frame rails inside the body. Use with our Eliminator II 4-link and tubular A-arm front suspension. Ground clearance is 5" at the 4-link crossmember and 3" at the firewall. Frame rails are made of 1-5/8x.134" round tubing. The front and rear frame rails join at the main hoop crossmember allowing you to make the rear rails narrower, as little as 20" outside width, for bigger tires. The unique double frame rail design from the A-arm frame rail to the rear frame rail raise the driver area, while maintaining a low ride height for more aero dynamic body location. The roll cage assembly consists of 1-5/8x.134" wall and 1-1/4x.120" wall ERW tubing. The kit includes a pair of front frame rails; a pair of rear frame rails; bent 1-5/8" round main hoop crossmember; upper and lower A-arm mounts; tubular Pinto rack-and-pinion crossmember and mounts; complete roll cage assembly; rear coil-over upper shock mount with tabs and hardware; one engine mount loop; CAD drawing; and instructions. Due to sanctioning body rule changes, the purchaser takes all responsibility for assembling the chassis to meet the specific class you are running in. We do not guarantee these parts to meet any specific class requirements. Funny car cage is optionally available.