4" to 4.5" Bolt Pattern on a 7 1/4" Rear?

shhnappa said
Thanks, but want to clarify one thing. If I were to get a 73, 74, 75, 76 Dart/Duster (basically any A-Body) 7 1/4 rear axle shafts, I could just replace my existing SBP axles with no modifications at all, except replacing the drums? I mean, the spline number & diameter are identical?
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Not sure. The housing changed and the bearing on the axles is different, you may be able to but if you find the axles they likely are going to be in the housing so why not take the whole thing.