I have a 8.5" from an 81 camaro with 3.08 gears and I found a 1992 chevy capres with a posi in it,it is also an 8.5" but it seems really big and the bolt patern on the axle is a 5'' like on a chevy truck not a 4 3/4'' will this posi fit in my camaro rear end or will the axles be to big