Good news, I said within reason, as most things will swap directly over, but somethings are a little different from what I understand. Like the A12 head wont go on A15 without oil feed modifications and internals are different. Engine mounting points are also different on the A15

I used the factory engine mounts that came with the a15 and they sat on the mount rubbers from the 120y, if that makes any sence. But the intake manifold dont fit with my extractors!!! I knew it was too good to be true.