Worth While Bolt Ons?

[BowTie Eater 5 Liter]

well, i need to figure out which bolt ons are worth it for my car, i want to be running mid 13's with just boltons,then will come the real mods(when i get the cash)

pulleys? yes? no? (ive got a little bit of a stereo in my car, and need the alt. to charge properly, do underdrives affect the charging that much?)
throttle body? is 65mm big eanough to handle a twun turbo or a head/cam/intake combo? only want to do this once and feel that 70mm will hurt performance at this point(is this correct?), but dont know if 65mm will handle what is planned.

what else can you suggest? not looking to spend a whole lot at this point, ive allready got exhaust(headers, x pipe, flows), 3.73's, shifter, removed air silencer, k&n(which means fawk all)

im going to get a set of stock heads and port them and maybe see if i can get a stock intake and cut it and port it, but i doubt ill do the intake. the stock valve seals are shot, and the springs are worn, so i need to at least take the heads off, but dont want to dig too deep into it.