Well, I went and bought a 4.11 rear end from a 1984 S10 4wd Blazer. It is the correct width (60" from wheel hub plate to wheel hub plate). I did have to move the spring perches to the outside, 2 inches on each side. It fits perfectly. Once I install the engine and tranny, I will check the yoke angle to ensure it aligns with the transmission. If it doesn't, I will use shims. Thanks for the input.