8 3/4 axle ID help - truck?

Don't know about other cars and trucks, last A-body 8 3/4 was in 1972 - 8 1/4 Spicer after that. You can find 8 3/4 rears under all sorts of 1972 A- bodies because they were just using up all the complete assemblies they had left. I've bought whole 1972 slant 6 Dart 4 doors, just to get the 8 3/4...