For what it's worth I have personally ridden in a buggy with a 366 that ran excellent with a 1406 carb.
Basically his trick was an electric fuel pump plumbed in parallel with his mechanical one, then the set the float very low and had a cheap parts store regulator that gave the carb just enough fuel to run properly during normal driving. Then when lots of power is needed the electric pump can be turned on to cram the extra fuel needed past the regulator.
Sounds funky but it works and very well, wouldn't have believed until i saw it done and rode with him at Disney, OK.