Originally Posted by
zetec-Sam
Silver top and blacktop heads are the same for the 1.6. I believe the only differences are in the bottom end and the cam cover. Mounts and everything are also the same.
Not quite true, the two engine vary slightly, mainly due to the lifters if I recall correctly.
There is a myth that the Phase 2 (Or blacktops from earlier cars 2001 onwards) are stronger than Phase 1 (Silver tops Pre 2001 engines).
As for heads being interchangable, I sold my cammed P2 head to a guy with a P1 engine, and he has had no issues with it, so would say you would be ok unless using one from the Ro-CAM VCT engines, as I'm not sure if they are cross compatable.