You can bulk up the housing enough to stop any deflection that causes problems. But that just gets you to the next weak point. The pinion shears off at the yoke.
I did that with a 2.76 741 case 8 3/4. B body, 4 speed, centerforce clutch. Maybe 400 hp 440 on a good day. Axles, u-joints, and then shearing the pinion clean off at the yoke.
Gave up and put a Dana in it back when Dr. Diff was still selling cut down truck housings for a quite reasonable price and never broke another rearend.
'18 Ford Raptor, random motorcycles, 1968 Plymouth Fury III - 11.37 @ 118
