It all depends on the tires and the backspace of the rims they're on really...

I ran 32x11.50's on my truck and they rubbed like hell until I put on a 3" body lift. With the bl I could have run 33's pretty easily.

If they were available at the time though a bj spacer most likely would have been all I really needed. I just would have also had to do a shackle in the rear to level the truck.