[justcuz]

If you are keeping the 2 barrel you might want to plug the exhaust heat riser passages that go to the cast iron base of the carb. Drill them out till they clean up. 3/8 if I remember correctly, then tap and plug with 1/4 pipe allen headed plugs. Thread in till flush with top of the intake. This prevents the vacuum leak that developes when the base gasket blows out from the exhaust pressure on the base of the carb. Many people with early Chevys that had 2 barrels wondered why the car (or truck) suddenly started running bad. Usually this was the answer, the gasket blows out and causes a huge vacuum leak and acts like a giant EGR valve.