i was thinking of dropping in a 3.4 DOHC, i was thinkin just goin to a junkyard and get what i need, but would i be able to just drop in the engine in place of the other one? and i already looked and found a cold air for my current engine. maybe just start off with that. today i took off the duct from the air filter to the throttle body and was in a hurry and didnt put it on, and i noticed a bit more power, and when i had it at WOT it was louder, like you can hear it coming from the throttle body, or something, and will my current tranny fit on a 3.4 DOHC, and are there any upgrades u can do to a 3.4 DOHC too? and im pretty sure nos is illegal around here.