[sammyg2]

Some old muscle cars with holly 4 bbl carbs had this problem if they had the side hung floats. They updated most of the higher performace carbs with a different bowl assy with center-hung floats and that pretty much took care of it, as long as the float bowl setting was on the high side of the tolerance. That sometimes led to sluggish idling but at least it didn't crap out on top end. that's the only ones I am personally aware of.