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So I guess now the only thing I need to do is to track down a rear axle and change the front to 5 on 5.5 bolt pattern.


The only rear axle that you're going to find that's 5 on 5.5" and near the same width as your new front is a Scout 44.

Why not just use an '80 and up Waggie rear axle (either an AMC 20 or Dana 44) and leave the bolt pattern alone on the front?