Okay.... I see where this is going. (Ya'll are hijackin my thread!!! wink jk)
I found an SM465 and by machining I assuming the bell housing center hole needs to be bored out. I tried fitting a bell housing up to it from a 302 and the center hole is a 1/4 or more too small. The bolt pattern however measures out to be the same. Check my new pic's as I have posted pic's of the tranny and Differential. Can anyone tell me what (other than corporate) rear end it is? Thanks guys, this discussion has been incredible.... you all ROCK!