I've owned a 2003 Cobra. I've done a ton of research on it, and I know that the engine is really tough. What I'm curious, is just how different is the pre-terminator engines other than the supercharger. Would like to know all differences ie, compression ratio, cam specs, bore and stroke, valve lift, metallurgy, etc. Is the engine fully aluminum? What type of rods and pistons? What size throttle body does it have? How much HP can it handle before needing internal upgrades? The reason I ask, is my father has a 99 Cobra and it has a Vortec supercharger on it already and it's been dynoed at right around 450 HP. I might be able to get it from him soon, so I'm starting to think upgrades such as smaller s/c pulley, full exhaust, throttle body, ignition, fuel, tune, pulleys, and nitrous. Just curious differences in tolerances. Any help would be appreciated, thanks.