a stock truck 8 3/4 is 59" flange to flange

same as a c-body 8 3/4 housings

A-body 8 3/4 bolts in on the same 43" perch centers and tuck 12" rims in the fenders with a 29x15x15 M/Ts in the fenders.

my 67 c-body/E-body housing is 55+ (30" axles)flange to flange and work well in the trucks for a slightly narrow housing tuck 10" rims nicly

I have a 94 xj jeep axle bolted in a truck on the same 43" perch center also... not heavy duty but got me 3.73 gear tucking 12" rims same as the A-body (good donor for the A-body also)