I can help. Can't do it this weekend, and you have to bring the trans up to my shop. And if you have an engine stand bring that too. Both of mine have motors hanging on them.
There is a place in pelham that does the allisons that suncoast recomends. Call down to suncoast tomorrow and ask them. I can't recall the shops name as of right now. He's a little expensive but it will be worth it.