zz502 vacuum gauge readings at idle

[@MrTNBassmaster]

If you would set your idle at the recommendation of 800RPM it would have very good vacuum. setting the idle at 550 is plan wrong . You can hydrolic the engine . I have the Chevy booklet that came with my zz502 clearly states 800RPM.

[@bmclaurine]

WTH is a "six-shooter" carb ?

[@vrm86gt]

by the looks of the aircleaner its probably a tri power carb setup