Originally Posted By DoctorDiff
The pinion is offset 1 3/16" toward the passenger side on all A,B,C and E body Mopars. The engine, transmission and driveshaft tunnel is also offset.


This^^^^

Depending on what you are building
an 8.75 will have equal length axles
D60 will have the drivers side 1 3/8" long than pass side.

Dr Diff has a really nice calculator on his site.