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Donor Rear End Measurements
60-61 inches > 64-69 1/2 ton 2wd Chevy truck/ Some GMC 6 lug rear end 12 bolt Coil spring set up Possible gear ratio's 3.70
62 inches > 64-77 Chevelle, 73-76 Torino, 89 Trans Am,
70 2wd truck 6 lug rear end 12 bolt Possible gear ratio's 3:08, 3:40, 3:73
70-81 4wd 6 lug reared ...............................................................
71- Newer 2wd trucks use a 5 on 5 lug pattern
71-76 Full Size Cars " "" ""
i have heard of the 5 lug axle swap on the 70 they used a 71-?
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