If you opt for a single 4 barrel you shouldn't have any clearance problems with the hood as long as you don't use some weird height air cleaner. Holley and Edelbrock 4 barrels are practically the same height at the air cleaner base. A little more clearance can be had by using a recessed bottom air cleaner. The filter will still be the same but the base will "droop" down over the carb and make it sit lower.
