i have vitek wires 8mm, iridium plugs, an ACT stage 1 clutch, but no ECU, no cams yet, and what's the throttle body mod and what does that do? how much does headwork cost and where? piston work, how much does that cost? if these are fairly cheap mods as in not over $1000, I'm willing to do it! anyway, help me out here, I'm looking for all motor. nos is not permanent power if you know what i mean.