Thank for the quick responses guys... I've read ALOT of Redheartbeats posts and replies and he seems to know quite a good bit, so I'lll definately take your advice on consulting him. As it stands for now, it's going 5.3 with 4L60E because I got everything in one chunk, but later on when my other 91 K1500 sells, I'll be investing in a Tremec 6 speed. Should be a wicked ride when the 6 speed and turbo is in it (although I know I could pull better numbers with an auto, but I'm partial to full control over my drivetrain, lol)