I owned and enjoyed a 421 HO 1966 Catalina 9 passenger station wagon. Pontiac factory literature shows the HO engine NOT being available in a Catalina wagon and NOT being available with AC. My car was purchased from the original owner immediately after he traded it in. Looking over the car when purchased, it just didn't have the look of a vehicle that had ever been messed with in any way. Too much original content other than wear items. No PHS in those days. I have seen a few others that were claimed HO's as well. Block code and cam were HO. Long exhaust manifolds as well. I realize the entire engine could have been a post sale transplant, but it just didn't look that way to me.
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