Just purchased a 2nd Zetec engine to build up. Any recommendations on what should happen first? I've been thinking head, but maybe I could benefit from something else. Any answers would be appreciated.
I agree. Build the short block. Then you know what ever you put to it, it will take the abuse. Bump the compression to 10.5:1. I'd then port the head, install larger valves and set up a pair of cams. A lot depends on your plans for the engine. Build so as to match components for the use intended.