I have a question, what spring rate would you suggest for the rear? This is a DD and I dont really mind a hard suspension, I'd much rather have traction than a baby bottom smooth ride. The truck is an occasional track truck, and it'll occasionally see an open track event. I very rarely haul anything or tow anything so the bed is predominantly empty. I have been looking at TCI's coil overs and they come with up to a 350 or 400 rear spring. What would you suggest?