Hi I recently got an mk Indy with the Ford 2.0l DOHC engine that I know nothing about other than been told it is a Sierra engine and I need to find out if it is 8 or 16v any ideas? And need to change cam cover gasket

I want to get more power from it but have been told I’m better off swapping it out for a Ford zetec st170 engine is there really nothing I can do to get more power out of the old irl