1937 Ford cylinder head question

[37 Coupe]

Originally Posted by V8COOPMAN

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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. I have a pair on my '37 coupe engine. DD

Are they 18mm sparkplug threads?

[V8COOPMAN]

Originally Posted by 37 Coupe

Are they 18mm sparkplug threads?

Yes! DD