Small Base Carb for a 350

[John1371]

I have an '71 FJ40 with a 350 swap. Carb has a base bolt pattern 3.25" by 1 7/8". I'm having trouble finding a replacement Carb with auto choke that will fit. I'm starting to think I had a Marine Carb on the engine. Can't tell what year my engine is but am guessing it is pre 1992. Any advice is appreciated as I'm new to all this! Thx

 

[DrDuc]

Have you considered changing intakes to something more modern? It would give you a lot more carb options.

 

[John1371]

Have you considered changing intakes to something more modern? It would give you a lot more carb options.

No, I haven't but that's a good idea and something I might take on this fall or winter. My goal is to get this running for the season then regroup and prioritize what I need to do on this engine to get it more fine tuned. Just looking for something to get me back on the road quickly.

 

[aztoyman]

I'm no GM expert but I wonder if it's a SMALL BASE Rochester 2G. (There is a large base as well. ) I put a small base 2G on my Flathead Ford. I got it from Rock Auto. There is a 2GC and other versions which is the choke types. I bought a manual choke 2G.

I think they came stock on the old Chevy 283 engines.

If it is a Rochester 2G, they are actually good carbs and getting harder to find for guys like me that put them on old Flathead Fords. Maybe get a kit for it?

 

[John1371]

I'm no GM expert but I wonder if it's a SMALL BASE Rochester 2G. (There is a large base as well. ) I put a small base 2G on my Flathead Ford. I got it from Rock Auto. There is a 2GC and other versions which is the choke types. I bought a manual choke 2G.

I think they came stock on the old Chevy 283 engines.

If it is a Rochester 2G, they are actually good carbs and getting harder to find for guys like me that put them on old Flathead Fords. Maybe get a kit for it?

I think you're absolutely right. It's a 2g. I'm looking to replace it for something with an auto choke but the small bolt pattern is killing me. I'd consider selling this one if interested. Thanks for the response!

 

[aztoyman]

There ARE versions of this with the auto choke.

A2GC is an auto choke with the choke unit attached to the carb.

The 2GV is also auto choke but with a divorced choke that is in the intake manifold with a rod that goes up to the choke plate.

You need to find a small base 2GC. Just google it and find the applications and search for a reman. Like I said I found mine on Rock Auto but I WANTED the manual choke like you already have.

It might be easier for you to find a SBC intake and carb you like faster and cheaper than finding the small base 2GC. They are out there though and they are good carbs. There are a few specialty carb shops online that specialize in these and other old carbs. A few popped up on a quick Google search.

Here's some good info. Carburetor kits, parts and manuals - https://carbkitsource.com/tech/Rochester/TwoJet-index.html

 

[KYLXFJ]

IIRC gm used the 2 barrel in some cars with larger small blocks like the 307 and 350 as well. if that is truly 350 cubes then I will strongly second the comments above and I bet you would be happier finding a used 4 barrel dual plane intake and pairing it with just about any no frills edelbrock or Holley carb to be had affordable.

 

[Camotubebender]

Something like this?

 

[Camotubebender]

*