I searched around for a breakdown of all the codes for the number on the boss under the alternator but could only find posts of people asking what their number meant and people answering them. Is there a chart online? If not I could use some help with mine as it seems to have letters where people have numbers. F225R T long space 6 The R looks a little funny it's lighter and maybe stamped over something. Picture wouldn't upload, said it was too big and don't know how to resize on my phone. I can always email it you of you'd like. The engine was said to come out of an airport tug. From what I've read the F means 1970 right?

Thanks
Gene

Finally got the photo to work

F: 1970 model year
225: engine displacement
R: Passenger car engine
T: Built at Trenton Engine Plant

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Thanks Dan, is there an online catalog of this info?

Not as such, that I know of. I put it together for a chapter in Doug Dutra's book, and you can piece it together by looking in the front pages of various-year factory parts cattledogs and factory service manuals.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Thanks I have Doug's recent slant six book forgot to check there!