[bubba327]

Dave-- I read something on stovebolt (or somewhere??) about the carb positioning on a Six. I think It said to turn the 4 barrel carb sideways so the primary's fed evenly to front and rear as the six intake is a long rascal and the primary's are closer to the front in your picture. Recall some controversy on whether you get equal fuel to the front and rear cylinders. Maybe others can enlighten us both on this matter.
OR just keep the throttle down and the secondaries working and you should be fine!!!