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Hello All:

I have a 1930 Ford Model A Roadster with a stock drivetrain. I'm adding some vintage speed equipment -- including an original cast iron Winfield high-compression head. It's the 7:1 "red head" model.

I've searched everything I can think of to see if the answer to my question is in the archives (here and on the HAMB), but haven't had any luck, so here it goes...

Anyone know which spark plug was original recommended by Winfield back in the 30's / 40's when these high-compression heads were new? I know they were 18mm, but that's about all I know. Maybe Champion C-7?

Any information at all about what plugs / heat range / etc. were originally recommended for these things would be great.

For those running the vintage heads now, by all means share what plugs you're using -- whether vintage or modern plugs.

If this has been addressed already and I missed it, my apologies -- and a link in the right direction would be appreciated.

Thanks,

-Jeff