yes a c-body 8 3/4 housing is 59" flange to flange same as my 74 W100 8 3/4 housing 59"

only differance would be pinion length that may need a drive shaft change when swapping 10 bolt/12 bolt/8 3/4 axles around.

I have a A-body 8 3/4 in my 88 d150 tucking a set of 12" rims 29x15x15 M/Ts in the fenders.

a-body shares the same 43" perch centers and is a bolt in with the axle on top of springs and tubing the bed.

I am installing a E-body 8 3/4 housing 56.5 housing to tuck some 10" rims with a 275/60/15 in the fenders on my 85 stepside.
that's lowered/tubed.

I do have a 9 1/4 with 10" rims 3.75 backspace 30x9.50x15 mud tire on there now with no rubbing the fenders with frame sitting on axle. very tight but not touching.