I was looking for info on the XP 300 so heres what Buick built in '51. pretty far out engine its the first drawing on left [pushrod, and 'pent roof' combustion chamber]
https://www.google.com/search?clien...592&q=detailed drawing of Buick XP 300 engine
https://www.google.com/search?clien...592&q=detailed drawing of Buick XP 300 engine
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