Originally Posted by 1996thunderchicken
i have a quick questoin i got a 1977 chevrolet nova and i have been trying to find out who would make a ford 9inch for my application or would one from an old camaro work the reason im askn is that i have a ten bolt rearend and the guy i bought the car from said that this one takes speacial seals
Hopefully you have the corporate 10-bolt 8.5" diff in your Nova. If you do, the rear end is sufficiently strong for most any street driven combo w/a good set of 30 spline axles and a posi carrier like from Eaton.
If you find that yours is a 7.5", you can use a 8.5" from a 1975-'79 Nova or the 1971-'81 Camaro/Firebird. The Pontiac T/A came w/a posi but the ratio might not be what you want and the carrier can be a 2-series. Also be sure the diff you choose is a 3-series if you plan on a performance ratio. The 8.5" corporate rear end uses a 2-series differential for 2.41 and 2.56 gears and a 3-series differential for 2.73 and lower (higher numerically) ratios.