78-87 G-Body question

[TP_Nate]

Hi everyone I have had a 1985 Grand Prix 3.8 L since 89'. It is now time The 3.8L gave up the ghost about year ago. I am planning on redoing the whole car, putting in a 383 stroker, th350 or th400, but I don't know what the stock rearend is on the car.

Does anyone know what the stock rearend housing is, I want a 12 bolt rearend housing with 3:55 gears, but I was curious to what is stock, are there any identifying marks to be able to tell. Thanks again.

[BIG-L]

are there any identifying marks to be able to tell.

If it hasnt been removed, there should be a tag on one of the bolts on the rear end cover.Im sure that is a 10 bolt,but thru the years they used different sized ring gears.


~Larry~