why buy the gmpp intake? buy the cheap summit or other brand carb vortec intake for around $150 then buy the carb to tbi adapter plate for like $50 or whatever it is and run that?
biggest thing for tbi is having the chip made or getting the stuff to do one yourself. That cuts into mod money, it's like $300 or so for a custom chip thru tbichips.com I think.
I say bore, maybe stroker crank? then of course you got cam upgrade, chip, headers, then that's about it.
I don't think there's much else could be done with tbi for power other then upgrade this and that, then tune.
of course there's the tbi mods, bigger tb units, bigger injectors, etc.
going with vortec heads, that parts figured out then, can't really use alot of the budget on aftermarket heads or soemthing, so it really only leaves tbi and computer stuff, cam, then block work.
honestly though building a motor, you need to consider other things, like say cooling system, trans, convertor, and gears.
I know I only spent maybe $300 if that on rebuild parts for mine, stock rebuild, but I spent that much in ods and ends, like fluids, plugs, wires etc. so I ended up doubling that and spent like $500-600. if you do headers, then you need exhaust work unless you can buy it or do it yourself.
it would be wise to have the converter match your new cam, and also to beef up or replace the trans, definately when i thas alot of miles on it as well.
then you might want some better gears to help match everything up or better take off to really feel having more power.
