Hi Guy's "N" Gal's the writeup is increadibly long. I needed a 4X4 to get out in the pasture to feed the horses, but didn't want o poney up the money for a late model, I thought of this way back when the LT1 was a newcomer, and decided to give it a try. the write up was befor the TPI -- long story. but the dyno software "gestimate" in the 450 tq and 350 hp range with the TPI.
If you are interisted go here:

http://www.gmtruckcentral.com/articles/lt1swap.html thanks