I just bought 1991 GMC Sierra SLE 3500 4x4 SRW. It's got a GM 454 crate motor, working power windows and locks, 4spd/205, 3.73's, factory helper springs, factory tow hooks, working A/C...I could go on. What I need is help finding a new midshaft bearing for the rear driveshaft. The parts stores don't seem to be able to locate one. Also, does anyone have a p/n for the pocket bearing in a FF14?