Where there is a "will", there is generally a "$way$".
Have done a number of "blow-through" genuine Carter AFB carbs, and also a few Holley 4000 carbs.
The Rochester B (opinion) has enough issues without pressure; don't think I would want to be trying these.
Listing modifications REQUIRED for the Carter AFB:
(1) Throttle shaft vacuum seals
(2) Idle mixture control screws pressure seal
(3) Accelerator pump shaft pressure seal
(4) Fabricate aluminum baffles for INSIDE the brass float pontoons (no, Virginia, foam floats do NOT work!)
(5) Boost reference for the fuel pump (depending on boost)
"Pull-through" carbs are MUCH easier!
Jon.
