I’m doing a fairly budget build/V8/4 speed swap on my 73 Duster. I believe I now have everything for the swap. Here’s what I have and what I’m hoping might work. Seeing as a stock A body 8.75 in a Duster leaves a good bit of room to the outter wheel well, maybe I’ll be lucky and this will fit. It would be nice since I have all this stuff from years of collecting. Thanks!!

68-70 B body 8.75
7” Police wheels

My perches are right at about 44”
It’s hard to measure with the chunk in... but from flange to flange (housing, not axle) measures 55 1/8. I’m positive it’s shorter than that because I had to bend the tape a hair to get to the other side.