i recently did a engine swap out of a alero , i switced all of the sensors except for the knock sensor, my car has benn fine w/o it so far but it is time to tie up all of my lose ends, i need to know what to do becase the block casting numbers are diffrent between my old 2.4 and this new one that i have in there now. i guess what i am trying to blurt out is what the f do i do so that i can put a knock sensor in here, do i need to get a adapter for my old one so it will thread into the block or what, i know i dont need one but the check engine light is really pissing me off, some one help what the f do i need to do