Basic Rear Axle Dimensions
Common Mopar Rears

ApplicationWidth (in.)Pad's Centers (in.)
A-Body*55.643.0
B-Body '65-'7059.244.0
B-Body '71-up6247.3
B-Body '71-up SW63.447.3
E-Body60.746.0
C-Body63.447.3
F-, M-, J-Body58.544.46
*A-Body through '72 had the small 4-inch bolt circle and a shorter axleshaft offset for narrower A-Body brakes.

SOURCE
Moroso Performance Products
203-453-6571
moroso.com
Summit Racing Equipment
P.O. Box 909
Akron
OH  44309
Mopar Performance
Mopar.com