A guy is selling this: From newer chevy, should fit other years. 10 bolt, complete with calipers and disks. 3.73 gears with factory posi. COMPLETE and in perfect condition, low mileage. My question, I want to swap out the drum brakes and go to disc, will this set up work on my 84? Also, ordered from NAPA online twice and wrong part both times... I don't get it. I need the rear drive shaft seal for a 208 transfer case, 84 blazer. The drive shaft is leaking fluid. I have given the measurments to NAPA and still they send the wrong seal! The shaft that is going into the transfer case is 46 mm in diameter. Someone must have at one time or another replaced their seal. A NAPA part number anyone? Thanks!