I am wondering what will I need to complete a 5.3 vortech to a 98 trans-am LS1 swap. I have a 2001 Silverado with a built up 4L60E. I know i'm going to need a computer but i have no clue what else i need. Let me know. thanks a lot!

Actually, that's a pretty easy swap, and I don't think you need to change your computer.

I'd suggest looking over here:
http://forum.ls1truck.com/index.php?showforum=6