When I was looking at carbs for my truck (1953 3100 with 235), I got a Carter YF 3211 to replace a Rochester BC. What I discovered immediately was that it did bolt directly onto the manifold. However, the fuel line port and the heat stove port were in different places. I also had to make a new accelerator rod to fit and actuate the carb. Those are not insurmountable obstacles, but they were surprises to me. I did all that and didn't like how the 3211 made the engine run. I ultimately switched back to the Rochester. I'll use that for now.
