Re: 1970 gmc rearend
Axles or housing? The axles in a 73 up rearend are longer than either length 67-72's. 73 up Housing will "fit" with new perches & possibly shock mounts (leaf or trailing arm?).
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Carter
1968 Chevy SWB Fleet... Walt
1963-1/2 Ford Falcon Futura... Martha
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