[Ben IV]

I'm running 235/75/15 tires on steelies with 2.5" spindles and 2" springs with no rubbing issues and I've hit some bumps hard enough to rub the driveshaft on the upper rear crossmember or whatever it's called. I'm guessing your cut springs and cheap shocks are a contributing factor as well as wheel offset. Shocks would be the Cheapest thing to start with. I'm using kyb gas a just Shocks $37 bucks each for fronts on rock auto right now.