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Old 06-30-2010, 01:08 PM   #13
Bruce Lancaster
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Join Date: May 2010
Location: Madison, NJ
Posts: 5,230
Default Re: HOTTER DOWN TO COLDER - Spark Plugs

I need to refresh my memory of the relevant '32 or '33 bulletin, but Ford said something similar to what you said and I think made the C4 the service replacement for the A...
Again from my leakiy memory, I think the B started production with the C3 then picked up the C4 during 1932 direct from the V8 line.
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