It was a 79 frame with a cab shell from like a 96, aluminum body we built. 520hp 350 SBC, .500 lift cam, Holley 4412, 14:1 compression, extremely lightweight rotating assembly. the class was essentially a hobby class in a truck chassis. 10" wheels/tires.
we ran a 3/8 mile dirt oval, did 120+ on the back straightaway.
i wish i had more digital pics, i have plenty of prints from the track's photo guy.