8 3/4 Axle Housing

70 Challenger said
Outer “flange?” to outer flange (where the studs start to bolt on the drums is 56 1/2 inches. Center of bolt hole to center of bolt hole where U bolts would attach is approx 46 inches

Ok, thanks. Sounds like a E or C body. Little wide for me, but they can be narrowed. Somebody here will grab it for sure.