......See this is the problem with Joe’s repo D, F and H heads. Now every hillbilly with two grand is going to make a perfect W-30 clone and sell it at the upcoming Mecum auction as authentic. Unfortunately the fakes are SO GOOD now even the experts can’t tell. I think it is pretty naïve to think that everyone who buys these “Parts Place” repro heads has good intentions. Unfortunately money & greed is driving a great deal of the Muscle Car hobby today. After seeing several collectors burned badly recently on faked W30s - maybe I am more cynical than most. By the way these were not just novice Oldsmobile collectors. These were Olds guys who have years & years of experience dealing with and restoring Oldsmobile W-30s. But at least the trial lawyers will be happy, as it has now created a whole new market for them in dealing with collector car fraud.