I found a rear on Craigslist from an 85 Olds 442. Its an 8.5 posi with 3.73 gears. The guy says its still in the car, car still has stock engine. Said come on down and drive it. If I like it, he'll cut it out of the car. $1400.00. He said it comes with aluminum brake drums and the driveshaft. Is this a good price? I wanna replace the stock 7.5 rear in my Malibu.