figureing it all out

as i see it now this is the list of what i want in terms of engine stuff for my car:
-slp cold air induction kit
-holley or tpis throttle body
-tpis air foil, mini-ram and intake runners
-new heads havent decided on company
-all internals so pistons, rods, springs etc
-allready have slp headers on the car
-new exhaust again not sure which company but would definitly have the switch to get rid of the cats and run straights for when i race it
-and a high end turbo
(obviuously i would do all of the cooling, firing systems etc upgrades that would be needed to support this system

First of all how much boost do you think i would be able to run through the turbo
Second what do you think i could get potentially horse power wise out of the car (its a 5.7L)
Third i plan on having this car set up to run primarily on a race track and not a drag strip but it would also be street driven fairly regularly, what type of transmission / differential would be the best set up for what i want

If your not gonna drag race it do a T-56 swap for a tranny. And if your gonna go turbo with a V-8 you should do twin turbo. Why do things half ass.

true true twin turbos are definitly being considered
but if i was running a set up like that with all the other parts i want id assume the car would put out at least 800 horses? could a t56 handle that kind of power