Hey guys, long time G body owner here, but new poster. I'm finally getting around to upgrading the brakes on my 81 El Camino. I'm going with the Blazer spindle and hub swap for the front. But, I'm also interested in converting the rears to discs. The aftermarket kits are out of my budget, plus I prefer OEM stuff for brakes because I don't always trust the aftermarket guys to do all the R&D to make sure their product is safe. This car is my daily driver, but I'm trying to take it to the next level. No drag or race car, but more just to be able to take to autocross events and have a little more fun. So... long winded way to say, are there any good junkyard swaps for rear brakes? Do you have to swap out the whole axle and diff? I'm not opposed to that, my axle does leak slightly.