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?