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A week or so back, there was a discussion on 333882 heads. I made the statement that I had an original 74 Z-28 engine with these heads that came from the factory with 2.02 intake valves and they obviously were made prior to the 1975 date that most publications state as the start of the factory "lightened" castings. Most pubs put the 333882 castings in that category, but I have to disagree (as I have stated previously).