I highly recomend a G-Body monte carlo, regal, el camino, ect, i just purchased an 86 for 500 dollars and drove it home, sure i am replacing everything but thats not the point, they are full frame, you can fit a big block in the easily, and you can get a shell for cheap, tommarow i am going to pick up the motor for mine, its a wild 350 thats coming out of a nascar show car, behind it i am mating a th350 long tail with a 3.73 out back, oh yeah, monte carlo SS had the option of a 3.73 posi out back for 78-87, any camaro of similar years would also be killer