Originally Posted by SVP5TEN

since you have the exhaust header off look on the very top of the engine block. not at the head. the casting of the engine block should stare right back at you. you will be able to identify the bottom end. i believe you have a z20 block. if you are also looking to identify the head look at the numbers casted on the head. and post them on this board. so we can help you further.

edit: by the way in my last post i meant spark plugs. not injectors. sorry if i confused anyone.