Jon, this will be a little off topic but I am curious...in your opinion, what is the best carb for a 261? Especially since Carter didn't make the YF for that engine?

I'm currently running a 261 version of the Rochester B. My 261 is bored .080 over, so the displacement is actually about 272 cubic inches. Because of the increased displacement, I installed a .067 jet and that seems fine based on the spark plugs.

I'm happy with the Rochester B, but I've been curious about your opinion about the best carb for that engine.

I had a couple Zenith 228's off of late 50's GMC 270's that I wanted to experiment with, but the mounting holes were a little too close together to fit the Chevy intake. I have read that the Zenith 228's were also available(but very rare) with the wider mounting holes to fit a 261 intake and am always on the prowl for one when I scour junkyards.

Thanks,

Matt