[ford428]

because I live in the industrial N.E. I will continue to use Motorcraft paper filters on my vehicles, IF u are concerned about flow, just increase the size of filter. example 12" dia. to 14" dia..or if space permits 3" height to 4" height...also a tip most engines are running an air cleaner too close to the top of the (Holley)choke shroud...ordinarily milling this off will give an increase of only 12cfm...BUT if U were running an aftermarket unit because of hood constraints, milling the shroud off in this instance will yield up to 150cfm..the difference here is unbelievable!