Your gonna want front springs for a big block car then. Not sure on the leafs though - 69/70 had some options for drag pack cars - staggered shocks, whatnot....good question. The clevo weighs a lot more, so I guess you would need a bit more beef back there I suppose. I'd really consider going to a disc brake setup if it doesn't have it. That's a lot of meat to stop on the tiny drums.....