How's it going guys, I have a 1954 3100 and recently Iv been looking at replacing my rochester b with a carter yf carburetor. Upon research I found that the 2100s mode would be a direct bolt on. Upon further inspection, I found that the 2100s is also interchangeable with some other model numbers, one of those being the carter yf 966s. I found a used 966s that I was looking to purchase, but the seller says the mounting bolts centers are 2 5/8" apart. However my trucks spacing is about 2 7/8" roughly. I see the 966s is listed for fitting 1950-1952, but other places I see it's a direct replacement for the 2100s which I believe has the wider spacing like my truck. So my question is, can I use a 966s on a 1954 235? Was the carb mounting bolt spacing on the earlier 235 motors different from my 54? If so then the 966s is not directly interchangeable with the 2100s. Thanks for any info you guys can provide me with!