Ooooh, I got me a set of X heads! Whoop-de-damn-do!
One more time.
Any head that came from the factory with 2.02 valves is already screwed up and will never be as good a set of something like J heads starting with 1.88 valves that you put in 2.02 valves and do the throats correctly.
Dad said, "Ya gotta be smarter than your cylinder heads!"