I am going to be running the same set up building a 383 sbc 2 piece rear main, I have a t56 same as yours out of the same car. You should contact
www.ClassicChevy5Speed.com They can help you out. You will need a Fly wheel and clutch if you dont have it already. Inland drive shaft should be able to get you goin with a drive shaft they are in Riverside area of California.