Just wondering if anyone has ever done that. Like if you blew up you k20z3 but you couldn't find one and got a k20a2 laying around. It is very possible but you will have to cut part of the intake manifold and maybe it will work fine with stock pcm. Just wondering cause someone ask me that but I am not sure because of the cams being different and how the Pcm with react to it. I think it wouldn't be a problem if you swap the cams over.