Pat, what you have pictured is a single action AC type pump that is correct for any stepdown . Largely these came typically on Super series cars or Pacemaker/Wasp vehicles. In the early 1950's Hudson additionally used single action Carter pumps on the Pacemaker and Super series cars but by 1952 they were mostly switched over to the AC single action pump. Nothing wrong with the Carter pump. Actually easy to rebuild. The story I have heard was that Carter was pressured by GM to get of the fuel pump business for various reasons and did so to avoid future financial and legal problems. Carter also built a double action pump as well. In addition to the AC OEM pumps there are also a lot of Airtex pumps who were authorized by GM to sell virtually identical replacement pumps

Lance,
Thanks. The team at Now & Then Automotive suggested the 'FSA-123' kit for it, but I don't know whether that means it is an AC or something else. They believe it to definitely NOT be a Carter; if it had, the N&T kit would be CK-102. They're asking me to remove it from the car to remove the doubt. I get that.

Looking at images of "single action Hudson fuel pump" as a general web search showed many that have the same casting features, including the small upper chamber vent hole above the inlet. However, the images, including webslites like ebay, forums unrelated to Hudson, vendors, show what appears to be the same pump but called an "AC, Carter, SW" and others.

Yeah, I know...the internet does not equal accurate data. I consider it the mix up of facts and opinions with caution. Don't trust, but Verify.
The kids movie Inside Out addressed it well:

Thanks, Pat

What is the number on the flange?

Won't know til I can get back to the car at my friend's garage, pull it off. Was hoping for ability to identify manufacturer from casting features. If not, I'll wait.

Pat, It's FPA 123 AC single action..It is NOT a carter.

As Lance stated, it is an AC single action pump. The Carter has a different profile. You also need to loose all the extra fittings on the out side.

[quote="Lance Walker" post=16213]Pat, what you have pictured is a single action AC type pump that is correct for any stepdown . Largely these came typically on Super series cars or Pacemaker/Wasp vehicles. In the early 1950's Hudson additionally used single action Carter pumps on the Pacemaker and Super series cars but by 1952 they were mostly switched over to the AC single action pump. Nothing wrong with the Carter pump. Actually easy to rebuild. The story I have heard was that Carter was pressured by GM to get of the fuel pump business for various reasons and did so to avoid future financial and legal problems. Carter also built a double action pump as well. In addition to the AC OEM pumps there are also a lot of Airtex pumps who were authorized by GM to sell virtually identical replacement pumps

Lance, Doug: Exactly correct. I pulled the pump last night and upon inspection confirmed it as an AC based on the outlet casting (photo); further it was rebuilt by KEM (aftermarket supplier back in the day) based upon the flange stamping "KET" (photo). As is typical, the flange part number was filed off, which the aftermarket repair companies routinely did. Finally, the number 584 confirms it to be the original AC single action version (image from AEA service note).

Doug: you don't miss anything. The cobbled up hose clamp, plastic filter, hose clamp all adjacent to the exhaust will be going away. THis is another example of my plans to undo things on the car as I found them. The entire line back to the tank appears original, fittings and all. That too will be replaced in the next week or so.
Thanks fellas!
Pat

Doug,
I think someone was pulling your leg about AC warning Carter to leave the fuel pump market. Carter was the major OEM supplier to Ford, Mopar, and AMC for years after. They are still making pumps today.

Pat

That's not a rebuilt pump. It's a new manufactured pump by KEM. Kem was located in NJ from the 1920's or 1930's until at least 2005. I believe they were sold to someone and moved to South America.

Eddie,
I didn't know KEM still had such a recent presence, but pretty sure part of their business was rebuilding other companies' pumps. Perhaps the rebuilding itself was done by localized shops, I don't know.
Regarding my pump, it clearly has an 'AC' cast at one of the ports, the patent information on the flange and what appear to be the AC Part numbers on the cam rocker and other parts.

I'll be purchasing the kit from Now & Then for the AC single action pump.
Thanks Guys !!

Eddie, wasn't me that said that., think it was Lance.

[quote="Pat Mescher" post=16254]Eddie,
I didn't know KEM still had such a recent presence, but pretty sure part of their business was rebuilding other companies' pumps. Perhaps the rebuilding itself was done by localized shops, I don't know.
Regarding my pump, it clearly has an 'AC' cast at one of the ports, the patent information on the flange and what appear to be the AC Part numbers on the cam rocker and other parts.

I'll be purchasing the kit from Now & Then for the AC single action pump.
Thanks Guys !!

Doug
Sorry about that. It was Lance. I saw your post where you copied part of his.

Pat
You are right in saying Kem sold rebuilt pumps, they were usually stamped with a "R" after the part number. Their main fuel pump business was selling new fuel pumps which they bought from OEM suppliers, stamped their name on it and if it was bought surplus the OEM name had been removed. This is what most aftermarket suppliers did. It would cost a large fortune in equipment to make all their own parts. A good example being PCV valves. Open up a box from Kem, Echlin, GP, Sorensen Filko etc and 90% of the time you'll find an AC valve inside.

All,
I am two weeks late in saying, "Thanks for the quick guidance on this". I ordered and received the pump kit, disassembled the pump, flat cleaned the seal surfaces for the new diaphragm, reassembled and back on the car. Fast & Done. I've done many a pump rebuild, but set a record on this one.

Still many things on the list...