More carb can't hurt. On the later 250 Chevy put on a progressive 2 bbl carb. It did outperform the one. If you go with the 2 bbl Holley-Weber from Stovebolt, which is a progressive setup, your mileage should stay about the same unless you keep your pedal to the metal all the time. Torque will be about the same, too. Tom can give you advice on the linkage. His adapter works, I just don't care that much for it's looks. For my friend's 261 we will machine our own adapters, but that might be a while.

Tom's carbs have two styles of chokes, one electric and one water heat. We got one of each and used the electric.


Fred
52 3600
69 C-10