Cast Iron Winfield High-Compression Head - what spark plugs were used originally?

[pick]

Purely as a point of reference, with my Brumfield 5.9-1 head I've always run Champion W18 with great results for all kinds of driving, from putting down to the ice cream stand to charging up a hill climb.

[28-31]

Originally Posted by pick

Purely as a point of reference, with my Brumfield 5.9-1 head I've always run Champion W18 with great results for all kinds of driving, from putting down to the ice cream stand to charging up a hill climb.

Thanks -- I appreciate the response. I'll check out the specs on the W18 to see it's performance characteristics for my own information -- but I believe the W18 is a 7/8" plug and the original Winfield heads take an 18mm.

[just plain bill]

Originally Posted by 28-31

Thanks -- I appreciate the response. I'll check out the specs on the W18 to see it's performance characteristics for my own information -- but I believe the W18 is a 7/8" plug and the original Winfield heads take an 18mm.

I would go with the D series, I have used D 16 's with good results in other vintage cast iron heads and plan to start with that number in my Winfield "Crows Foot"