Just need a little in site on this. I have a zc in my car and have an extra a1 that's supposedly built(how true this is I don't know.) I know the head gasket for the a1 is what is called for on the zc, but will the a1 head work on the zc block? Everything looks like it will work and lign up correctly(except for the cam gears.) An also the a1 is a 2nd gen and my zc is a 3rd gen. Any help is greatly appreciated.