Hello Everyone
I have access to a 8.5 10 bolt from a 1990 cadillac rear drive,I would like to install in my 1979 sdv it seems from the measurements [not very good at]that it might work,anyone know for sure?I also have a auburn posi from a low mile wrecked 1991 chevrolet cop car,my guestion is can I put in posi with old gears without gear noise or hum,if so please explain.

Thanks
oyoung