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MM Heads

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Dave 403 MM

10-12-2017 09:18:43

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Can anyone tell me the year or approx. time that MM went from the ( GE30-) heads to the (10A 42--) heads? Thanks.

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10-13-2017 10:43:26

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 Re: MM Heads in reply to Dave 403 MM, 10-12-2017 09:18:43  
I have a 50 utu gas with 4209 heads and a 53 ub with 4210 heads and a 52 utu with 1 4209 and 1 ge30e. Help any?

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10-13-2017 08:07:18

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 Re: MM Heads in reply to Dave 403 MM, 10-12-2017 09:18:43  
Around 1952, Late 52s and UBs had the 10A heads. The main difference between the GE head and 10A heads were the 10A heads had stalite valve seats. Could have been a little earlier I'm not sure.


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bill collison

10-13-2017 06:23:01

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 Re: MM Heads in reply to Dave 403 MM, 10-12-2017 09:18:43  
I have a 1950 utu serial number 0115000896 with GE30P heads and a uts with 10A4206 heads serial number 01202267 don't know what year that would be both are lp also have a 1950 utu serial number 0115002452 gasoline with GE30E heads hope this helps narrow it down

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