New and need some serious help

[viridionplague]

looks to me like a turbo'd 420a engine typically found in the 2nd gen dsm's.

i believe the same motor from a neon is actually sohc, and mounted backwards. as well as a few other differences.

the 420a out of an avenger or sebring would be the same from my understanding.

im guessing that the car is did not have an engine "swap", but had the engine replaced. and a turbo kit added