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F10 = F100 2WD / B = 300 1V I-6 / R = San Jose CA Assembly Plant / 779665 = 1966 .. assembled November 1965.
Compare the VIN stamped on the Warranty Plate (located on the left door face below the latch) to the VIN on the registration/title to see if they match.
People replaced damaged left doors with used doors, 99.9% of the time, they failed to install the original Warranty Plates on the replaced doors.
1961/66 doors are the same except for 1961/63 Uni's. If the VIN's match, it's a 1966 not a 1964.
The trans (unless a 3 speed w/Overdrive) is the Ford type 3.03 3 speed manual all syncromesh that was introduced in 1963 F100/250's.
3.03 TRANS code stamped on the Warranty Plate. A = 1963/65; C = 1966.