what do you basically need to do???
if anyone can break it down to it's easiest form

 

Search is your friend, this is covered in many places. There's even a sticky bud!

 

Here you go..

http://www.skulte.com/T56.html

That covers basically everything. It's a simple swap, depending on how experienced you are.

Oh, and just incase you want that T-56 to be a bit stronger, Tick Performance rebuilds LT1 T-56's to withstand a whole LOTTA power, for a very decent price. $1,699, labour included, to withstand over 600 FT.-LBS.

http://www.tick-performance.com/