8.5 10 bolt ...need more info..

[spidereyes455]

Monte ss had a 7.5.

8.5's came in GN's, T-Types, hurst olds, and I think 442's. but not all were posi or had desirable gears like 3.42 or 3.73. So know what you're buying.

Yes 442's also had them and it is true that not all were posi but, from the factory all 8.5's in GN's T-types and Turbo T's had 3.42 gears and all Hurst Olds and 442's had 3.73's. No other Gbody cars had these rears as built by the factory.