Am I just lucky with my 7.25?

All 8.25 5 bolt rears are 4.5" BP. My cammed 318 was stock except for the cam, eddy
DP intake(we're talkin' '82 version) 600 Holley VS,&2" duals. I was lucky for a while,
then it split the spiders in two and left them in the bottom, while my speedo happily
sat there idling at 25mph. That eng. put that car 14.50's, AFTER I swapped a 4spd. &
8.75 w/3.23's... the 8.25 will be perfect, a SG 7.25'd hold.... but scarce and not that
much lighter. Shortened driveshaft if you don't find one is only real non-easy part...