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Is a carter 966s a good replacment carb for a stock 1955 235?
I know the YF is but I dont know if the 966s is for a chevy or something else? someone told me a 2100s is what I need. looked on carb kings site, couldnt find anything on the YF?

The Carter 964s is the stock number for the carb that chevrolet indicates for the years 1937 through 1952. It came with initial venturi size of 1 1/32" and secondary venturi at 11/16 id. and the main venturi at 1 1/4" id. . I don't know the specs of the 966s but perhaps you can find it in the Carter Carbutetor information for Chevrolet and GM on line. I have been looking at the YF series 2467 to modify for my 235. I believe the 964 is a size 2 and the 2467 is a size 3 so the issue is the venturi sizes and the vacuum. Too big a venturi and the carb will run lean...not a optimum. Bigger is not always better or more effective, less vacuum may not excite the venturi adequately...especially if you are looking at dual carbs. I know there are some pretty carb wise guys out there so I am pretty interested in some replies about this as I am tinkering around myself.

There are two excellent reasons NOT to do this:

(1) This thing is calibrated for a MUCH smaller engine, and would require major modifications to work well on a 235.

(2) Since this is a highly sought after unit for the Willys Jeep, it is worth at least double the value of a Chevrolet carb. Find a Willys guy and he would probably trade you 2 for one!

Jon.

Jon.. thanks for the reply. The learning curve on this site is pretty steep, especially for the infrequent user. The info you posted is wonderful, and I really appreciate your time to do so. I recently just became a Chevy guy , having been a willys guy for long time. I thought the l-226 was a similar enough engine to warrant tinkering with th YF. Having a box of these seemed like a good resource for a project. Thanks again for setting me straight.

Thanks for all the help guys!!!! guess I better keep looking for a 2100S

In my Carter Carb. book a 966-s is listed as a replacement carb for all 1950-52 235 engines in cars and trucks. It should work fine.