rear end posi

[nfldwrb2030]

hi does any one know which rear end posi i needi have a 350 rocket in my 87 olds cutless and were i can get it from

 

[84cutlass454]

it sould be a 10 bolt 7 1/2 rear end so any one that is 7.5 or 7 5/8 u prob got 26 spline axles so a recommed buying after market 28 spline axles from moser they are like 250.99 a very good investment and a 28 spline posi.