Damnit!!!
Every time I think this chart has died out someone brings it back. Trailbeast, I expect better from you. More than half of the dimensions on that chart are wrong. Some of them painfully so. I mean seriously, I know that YOU know there's more than two B-body axle widths.
Worst Mopar chart in the history of the internet. :BangHead:
The list you need is literally stickied at the top of this forum.
An accurate 8 3/4" rear axle width list
Your current 8.25" housing is 51.5" flange to flange, so as mentioned a 50.75" 8 3/4 isn't actually that different from what you have now. You'd lose 3/8" worth of clearance per side to the springs assuming you're going to run BBP axles. If you're going to run axles with the SBP flange offset, you'd actually lose .75" per side compared to your current rear axle because of the difference in the flange offset from BBP to SBP.
As far as wheel fit, you'd be looking at wheels with a 0 offset with BBP axles. So, if you're sticking with 15's back there then you shouldn't have a big problem finding wheels. The disk brakes tend to widen the track width a little too, so you'd make some of it up there.
