The Carb Shop in Ontario ,CA makes a set of six pack carbs out of the older 500 CFM race two barrels carbs to fit a stock six pack air cleaner with all three squirters working up
I have worked on many stock six pack carbs and made them work without bogging, the key is the timing of the vacuum carbs opening and the setting the idle fuel mixture and fuel level on all three carbs so they don't bog up twocents

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)