[jeffspower]

Yep, 4" blocks in the rear. I was going to add a little more & never got it done. I built the anti- wrap up bars myself with leaf spring bushings in the ends. It will rarely wheelhop- & when it does, they hop straight up & down. The axle can't wrap up on launch or hillclimbing with them.

If you have problems with wheels not being centered in the wheelwells- build your own blocks. Weld your bottom centerpin in centered. Then mock it all up before drilling the top spring centerpin hole, & mark where the hole needs to be. This way, the top hole can be offset if needed to get the wheels where you want them.