[robnolimit]

Oops, only 1/2 the answer. I do like a softer spring/bigger bar set up. I do a lot of number crunching as a start, then go to the shop, then the track or street. This way I can cut down the development time. It's tough to get the rears to grip. I run a 220 rear spring on the bullit, it's on a rocker arm and the ratio yeilds 180 lbs on the axle. I may try a 200 spring, yeilding 163 lbs. Then it's all shock tuning. So, on a C-10, with the arm leverage and a bit more rear weight, first number crunch shows a 268 spring. So maybe a 300?