AC 4149 (old design, note stamping on the flange)
https://www.ebay.com/itm/292982220480
https://www.ebay.com/itm/303301894872

AC 4149 (new design)
https://www.ebay.com/itm/255016238248

Carter 2118 (old design)
https://www.ebay.com/itm/402823513655
click on: Lot of 2 Carter M2118 Mechanical Fuel Pump

Carter 2118 (new design)
https://www.ebay.com/itm/333984649828

Airtex 4149
Rebuild and/or reproduction company so any pump they offer is suspect.

I suspect Carter followed AC with the design change.
AC 4149 and Carter M2118 came out after 1953 (the poster's truck) and covered years 1952 to 1957 (verify).
Neither pumps are the original to the truck.

It's like I said before, find the pump you want and have it rebuilt.
Attachments
AC to Carter.jpg (82.31 KB, 85 downloads)

Last edited by buoymaker; 07/07/2021 12:06 PM.
"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."