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Actually, the heads with the firing order are Ford "Pilot" heads. Ford "Pilots" were the first post-war European, large Fords, beginning in 1947. Dagenham cast it's own version of the '37 Model 78, 221 cu. in. engine, and these heads were one of the changes. Apparently, gazillions of these heads ended-up as surplus here in the States years ago, and were in fact used as "replacement" heads. The engine in our '37 coupe has a pair of these heads on it. DD
