Any 10 second "All Throttle" 318's in door cars ?
Just too add to the speed master flow numbers mine did 233 @.500 with a good valve job and 2.05 valve but no porting at all. With some very basic port work they did 254 @.500 on the same bench. Keep in mind these were just "street" heads but the bowls were big enough I figured a 2.05 valve would be better given the valve job and give room to grow later.