in a recent thread there was a comment about the non-"PK" stampings being calendar year, & if the first digit of the date is missing on the 10,000 day calendar we would have the following:

(2)333 = Sunday 12/17/67 (H 1967 calendar year)
(2)361 = Sunday 1/14/68 (J 1968 calendar year)
(2)379 = Thursday 2/1/68 (J 1968 calendar year)

any of these that would've been factory installed in a 1968 model year car should have a partial VIN stamped on the top of the bell housing area