Aha! So that explains why I had to have slight amount shaved from my heads, immediately above where the valves lift. Without doing that, the valves would/could have struck the edges of the underside of the relief in the head. Knew there must have been a reason why that became an issue. The French blocks must have been 42 or later in valve design?
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Ford CMP, 115" WB,1942 (Under Restoration...still)
Medium sized, half fake, artillery piece project. (The 1/4 Pounder)
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