well the problem is that first you did a major head swap-- you upgraded everything for N/A and then you said "lets go turbo"
so you replaced your pistons with your old ones, took out the transmission and replaced it with the old one.
i forgive the transmisison because i do understand how annoying it is to cruise on the highway at 8k. especially when most of the time you barely see the end of third gear.
it jsut doesnt make sense to me why you wouldnt go forged on teh pistons.. esspecially if you wnat this engine to be solid-- it just seems some of the things you are saying like "staying in boost longer" is something a noob would say about the subject.
granted that you do know something being able to rebuild and engine more than once successfully. i just don't know if you have done the reasearch that you would ne to make this thing relaly reliable. thats all i'm saying.