You all are really helping me push away from the 7.25 ....(Shame too because i have a pile of like 7 of them and one with Bbp)
I am actually thinking ford 8.8 or maybe an 8.25 from a Dakota??? I am not sure of the width of a dakota it Durango rear end.
There are some ford options that are almost dead on A body width with very good parts and "posi" unit availability.
I am already into a custom made driveshaft because of the ball and trunion, so the other end can be made to turn just about anything.
As far as the sbp vs. Bbp thing......i was being lazy and keeping my drums all around. But with BBP i might as well upgrade to disk fronts. To my surprise, there are a ton of disk upgrade kits on the market now a days....way more than last time i looked into it, several years ago.