Stock flow #'s are low, i dont remember, but a head such as a trick flow, can have double the flow of a stock e7 head, literally
although i seen stock e7's trap as high as 108 in the 1/4, 3000lb car, thats enough to put an air lid, and cutout exhaust f-body in the rearview
Canefield also makes a good iron head, and can be ordered from keitcraft, in stock, or ported, and are good for n/a applications as well, and can get good flow#s for an iron.