Update 9-30-2020 : I finally got back to rebuilding my older “bigger” single barrel Rochester to put back on the 261 in my 1946 Chevy. Driving them back to back, I would say the Rochester has around 5-10% more horsepower at the top end. I put the Daytona Carburetor on my 235 Stovebolt in my 47 Fleetline and it is a perfect match. Same power output to me as the “regular” single barrel Rochester with the benefit of having a new Carburetor. As I mentioned before I’m very content with the Daytona performance. I’ll be doing a gas mileage test but I imagine it will be similar to the Rochester. I hope this info helps whoever is interested in these Carbs.