Re: 39merc block
Allegedly...no confirmation, but a good yarn...the "99" stamp on '39-40 239's was to distinguish 239 from 221 on the assembly line, since they looked exactly alike once assembled. Then somewhere in '41 or 2 Someone hit upon the idea of painting 239"s blue to distinguish from the mossy green 221, and of course the blue carried over postwar when all v8's were 239 '46-48.
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