Tim,
Thanks for the info. The pad says F0202JC which tells me Flint, MI Feb 2, 4 speed w/heavy duty clutch.
The block casting date is A311 which I believe is Jan 31, 1961. Hsrrison radiator has a 60M which I believe is Dec 1960.
The frame has that partial VIN number that matches the VIN.
This is the only truck I've owned but on at least cars I thought starting 1962 that the motor was keyed to the car by stamping a partial VIN on the pad. Every car I've owned had this. I'll have to check out cars at the next cruise night to see if that's true.
John