Issues with a rebuilt 360

start at the carb, and look for vacuum lines
pull them off from the nipples at the carb and listen for changes in idle
if there is no change, you either have ported vacuum, or you found the line with the problem in it

it could also be a bad base gasket at the carb itself
you figure that one out by spraying carb cleaner or starter fluid at the base of the carb
if there is no change in idle, all is well
Alright I’ll give that a try but there’s no way this could be a timing issue right? Cause I don’t think it is cause the distributor was right and I didn’t touch it but it does sound advanced as hell when the car is on