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10 bolt cutlas 1971 rear
I would keep that rear and make it posi . It is a good strong diff. If it is a true 1971 rear it will be a 8.5. , which means you can use any 8.5 posi unit from any 70's car including camaro, regal, trans am ,monte carlo, impala (10 bolt 8.5 rear), grand prix all 1973 -1977 car came with them. OR... you can do a 30 spline axles from Moser conversion and a 30 spline unit from a 1990 -1996 rwd car will work too . the 8.5 has huge aftermarket support posis bearing kits gears you name it.
If you close I will help you or build it . We have the Buick guy up grade there 8.5 71 72 rear all the time Moser 30 spline axles and Eaton 30 spline hd units and or spool. I will put them against any 12 bolt rear . Think twice before unloading that rear. Ok? Good luck on your choice.
1" on the drive shaft is good info the 8.5 rears have a longer pinion then any a-body car in the 1965-1972 muscle car era.
List of cars to get a rear from direct bolt in 1965- 1972
Chevelle
Monte Carlo
Elcamino
Gto
Tempest
Lemans
Skylark
Grand prix
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