DRAM said to jet it down because of the 'rich' main circuit(not the hi speed circuit at wot)which would suggest that the primary jets(or main bleeds are too small in i.d.) are too big.

ThermoQuads:stock, street/strip and race; 800/850 cfm's, 860/910 cfm's and 1,000 to 1,060 cfm's. New parts for all OEM 1971-1984, Competition Series and SuperQuad carbs and custom fabricating. Carbs bought and sold. Consulting on pre-purchases so you get the right carb the first time.