that Carter X fuel pump from Okeeracer is wrong - it's a Carbureter housing, not a Carter.
I make reproduction Carter X fuel pumps for Boss 302's, 428CJ's, 429CJ's, 65/66 K-Codes so I can make one date coded for your car if you like?
428CJ or Boss 302 Carter X fuel pump, $350 plus shipping
Here's an example of a 428CJ one I did recently:
Here's the 4441S (obviously a B2 is 4910S...
Date code
Here's a few pics of my '66 K-Code or Shelby GT350 pumps. '65 have the screw-on can on the bottom, just waiting for some to come in, I'll post pics of them when they're available...
'66 4201S