8.5 10 bolt posi


New Member
Sep 14, 2014
I am wondering if anyone can tell me about this. I have a 1981 Chevy Malibu street car, 375 HP 350 CI, Turbo 350 with shift kit and the weak link in this car of course is the 7.5 10 bolt non-posi rearend. I found an 8.5 10 bolt posi 3:42 geared complete rearend from a 1987 Buick GNX for sale. First question, would this bolt right into my Malibu and if so what is an average "good deal" for this rearend?


Jun 2, 2003
Catalina, AZ
I often see G-Body 8.5s for 400-600 depending on condition, sometimes they've had a little minor work (seals, etc.) done, sometimes not. I've also seen some people want $1000+ for a 100% stock, untouched assembly, but those people are a little crazy. I'd say if you can get it for under $500 you got a reasonably good deal, the GNX cover may recoup half that cost (or more) since it's a special cover, and you can put a regular 8.5 cover back on it I believe.

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