For '55-59 Chevy full size trucks with a 114-1/2" wheel base. For best fit, assemble the main cage and rear frame rails inside the body. Use with our Avenger 4-link and eye mount VariStruts or Strange strut front suspension. Ground clearance is 3-1/2" at the 4-link crossmember and 3-1/2" at the front crossmember. The front and rear frame rails join at the 4-link support tubes, these position the 4-link the correct distance from the rearend. Also allowing you to make the rear rails narrower, as little as 20" outside width, for bigger tires. The roll cage assembly consists of 1-5/8x.083" wall; 1-5/8x.065" wall; and 1-1/4x.058" wall 4130 tubing. Double frame rails in the center of the chassis increase rigidity for higher horse power applications. The kit includes a pair of front frame rails; a pair of rear frame rails; 1-5/8x.083" main hoop crossmember; two 4-link support tubes; upper and lower strut mounts; tubular Pinto rack-and-pinion crossmember and mounts; complete roll cage assembly; coil-over upper shock mount with tabs and hardware; two engine mount loops; 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.