I measured the rear end housing on my '40 Ply and compared it to a chart in the book "Chrysler Performance Upgrades" by Frank Adkins. Looks like '71-'76 B-body 8 1/4 & 8 3/4 rear ends should fit with no problem. Also the same year C bodies should fit. center bolt to center bolt the dimensions are almost identical. Flange to flange depending on the application your plus or minus only about 3/4 inch. I'd recommend checking this book out for more info. Good Luck, 40 plyguy
