Jim Curylo (JWC66K) asked me to chime in on this subject.
What you have here is a previously rebuilt fuel pump where pieces have been mixed and matched to suit the rebuilders application needs. You have, as others have said, a January 2, 1968 date code. All Ford pumps beginning in model year 1968 have a 3/8" inlet nipple where this one is 5/16". Therefore this cannot be a later Ford truck application as some do have filters but a 3/8" inlet nipple. Carter did make replacement pumps for earlier applications but there were no early applications with crimped fuel pumps and fuel filters where the stamping number began with a 4. Just to throw in another possibility for those that have noticed a 5, 6 or 7 in the stamped number is a 4567-S which fits a 68/69 302 and 69 351W. Those pumps do not have a filter either but could account for the pump casting. The CARbureTER Made in Canada casting is proper for part of the 1968 model year. All this said, the pump in question will definitely fit a 65 standard 289 Mustang, Falcon, Comet and Fairlane. Full size Fords with a 289 did not have the integral fuel filter.
In regards to where the stamped numbers and date codes are stamped, I have seen a lot of variations on which side they are on, the direction of the numbers and spacing of the stampings. There are many times that the numbers are illegible even with the pump in your hand and under a magnifying glass. The 3911-S is the worst as the 11 part of the number is almost on top of each other.
Thank you for letting me stir the pot on this subject up a little and add just a little more confusion.
-Fred-