Using 8 3/4 with /6

A few years back the 7-1/4 in 70 Challenger which has the /6, A904 decided to die due to bad spider gears. Needing a rear end for a d/d up jumped an 8-3/4, 742 one legger w/ 3:23's for an E-body. Paid a kings ransom $50.00 drum to drum (11x2-1/2). Fit up under no probs, shortened, rebalanced drive shaft new u-joints drove away with no apparent problems. Handled as it did before. Nothing like a little over kill, but hey, I won't twist axels and won't blow it up. 10 years down the road still driving it.