"I have a 66 kcode built in oct 22 65 that I think the 18K5A is best for."
Since your likely using the door tag for a projected and possible build date I would think that the pump made four days earlier (or possibly after your car was completed) would be too close and would choose the July fuel pump for a car possibly built only three months later (26G5A)
Not so much interested in selling as I am getting into a fuel pump that is correct date stamped for my kar.
If so then suggest you or we delete the post since it's in the FOR SALE section
so we can stay within the site rules. Thanks