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Re: Rear axle (not rear end) swap - 6 lug to 5 lug
1970 was a transition year for both the 6 lug to 5 lug as well as the overall differential width. Before ordering axles, you might want to measure yours to be certain of what you have. The '63-early '70 were 62" WMS to WMS. The late '70-'87 were 63 1/2" WMS to WMS. If you happen to have the wider 63 1/2 differential, you could use stock replacement axles. If you have the shorter version, you will have to get the aftermarket conversion axles available from CPP, ECE or Summit.
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