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Old 05-05-2019, 12:20 PM   #8
rotorwrench
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Location: San Antonio, Texas
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Default Re: “A” heads. Can anyone identify a head with just an A?

Casting procedures were always in a state of flux. Changes were made as engineering recommended and corners were cut whenever it would save time & cost of materials. Ford added the Mercury line with the 99 series blocks in 39 so changes had to be made a lot in 39 thru 41. I imagine all that casting stuff kept Charlie Sorensen and his people in the foundry pretty busy. That all was nothing compared to the changes that happened in late 41 and 42.

Last edited by rotorwrench; 05-05-2019 at 12:27 PM.
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