I've got an S10 Blazer 4X4 Rear under my 47 (on an 87 S10). The beds not setting on there right now but I had it on there to test fit it was close but did fit. This is with 15 inch 2wd S-10 Rally wheels with factory Tiger Paws. If memory serves the AD bed is 50 inches maybe 50.25 to the outside. The Blazer rear was 52 measuring from the rubber in the middle of the inside of the sidewall. So pretty close. Like any rear end swap it all depends on what wheels and tires you plan on running, and what look your going for. I have no idea what the offset is of the stock Rally wheel, I can pull one and measure as soon as I move some stuff in the garage next weekend.
I do know that the 2WD S-10 rear is 54 from mounting face to mounting face and the 4WD is 59. that's for the drum rear. I sold the disc rears I had so I can't confirm the measurements for them.
I went with the 4X4 Blazer rear at the time because a guy I knew was parting one and let me have it for $50. I had planned on switching to the disc rear but never got around to it and ended up selling 2 now so maybe I'll actually switch it out to the disc next time I come across one.
Mongo
