I have tried:
Dual original one-barrel Rochesters - too much flow (a little rough) at low RPMs but good response at high RPMs.
Dual progressive two-barrel Carter-Webers - no enough flow at high RPMs
SWEET has a nice set-up - I think he has dual carter one-barrel carbs (from 216s?)
I now have (two weeks of use) a single two-barrel Holley AA-1 carburetor that was used on GMC 270/302. It has variable jets. It has good top-end power and smooth low-end idle/response.
