my SJ motor, who built it

keefer

T1
Location
Tennessee
That is probably the abbreviated last name with first initials of the person who originally sent it to Pro-Tec to be ported. That is the way as stock head was engraved when I got it back from them years ago on an old ski I used to own. I guess it is / was their way to make sure the right part got back to the original owner.
 
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