So we're trying to put an AMC 20 rear into an 89 S10 blazer. It seems like the Model 20 has 1310's in it, as they're the same as my old 1/2 ton chevy. No problem there. What I can't figure out is what's in the S10's driveshaft. They're quite a bit bigger than the 1310's, and they don't fit the yoke I have laying around that is supposedly 1350. So would they be 1330's or S44? I'm not familiar with those ones, and don't know how to tell. Isn't there some site somewhere that tells you all the trunion and bearing cap measurements to ID them? I can't find anything.