If you are getting Fuse block and all, check this guy out. I've done this on 3 different swaps and its worked out fantastic!
http://lt1swap.com/underhoodfuseblock.htm
He explains how to use the fuse block etc. Its very simple and looks clean when done.
If you have a 700R4 or 350TH your drive shaft should still fit ( splines will work ) you may want to do some measuring to get the correct placement of the engine and trans to keep from having the added expense of having a shaft made.
Read read read, there are so many ways to do this. But I can speak from experience, you will be glad you did it!
Good Luck!