Thanks for the info... and pictures... gentlemen.
I thought the units were stamped as you described but wasn't sure if that was 'correct'.
Let me take a shot at the date code.
March April 27 1967 1st shift ?
Jeff, I think you have a typo, looks like your fuel pump pic is a 4194S , not
A NOS 9194S Fuel pump (picked up a case of these many years ago)
Coincidentally
I think this is the fuel pump correct for my 67 390 4V non GT car? Doubt if a non GT 390 car would have gotten a different fuel pump?