Re: 02 GT what cams should i get?
Well, Patriot, Trickflow, VT Blower Cams and CompCams are a few brands out there.
Usually there are different stages that you can buy. For a 2v with bolt ons stage 1's will probably boost numbers and still take advantage of the stock block. You could probably see high 12's with stage 1's, longtubes, gears, exhaust (midpipe), intake and larger t/b and maybe some aftermarket control arms. This isn't a bad street/strip setup and won't break the bank.
Any higher stage and you're going to want new springs, better flowing heads and intakes as they tend to pull in the higher rpms. Plus the stock shortblock probably won't allow that high of revs so a new block may be necessary.
Regarding cost to gain, I'd say after cost of cams, tune and dyno you'd have a good start for either a forged bottom end or blower.
12 Black GT500 SVT PP l 2.6 Pulley/Idler l Airaid l o/r X l 305 NT555R's l Recaros l
04 Azure Blue Mach 1 / 03 Sonic Blue 3.8 / 14 Sterling Grey F150 FX4 402A 5.0 / 11 GT500 R.I.P.