Thanks for the input all of you!!!
You gave me a couple of things to think about! I'm trying to figure out how/where to put jack stands with the control arms out so that I can tighten the mount bolts after I get the engine and trans in. Its gonna be fun!
Its gonna be a while before I get my 383 together and swap engines, but I'll post with pics when I do. I'm sure I'll have more questions before then. I'm taking my time and triple checking everything I can.