Mike - see this tech tip for Carter YF model numbers designed for the Chevy 235.

https://www.stovebolt.com/ubbthread...tor-identification-carter-yf#Post1531510

Several different 235-specific model numbers, with some subtle calibration differences through the years. I suspect ANY of them would work just fine. I can personally attest that the 2100s works great for me.

If TUTS59 doesn’t have what you need, feel free to free to PM me as well. I have a YF core I’d consider selling.

1951 3100