Just as Joe, above, said. Its usually 1 1/2" to 1 3/4" to get them centered.
Iv seen people make plates,or lowering blocks with offset holes,but turning the springs around is much simpler.
From my personal experience, having the rear wheels centered in the opening,makes me happy, and i like it.
Thats one of those "little details" that people seem to notice when theyre shoved forward where they dont belong.
"No,really, the truck hasnt been rear-ended".
