Air fuel mixture route on any Siamese port Stovebolt head: air comes in the side of the typical oil bath air cleaner and turns NINETY degrees to go down to oil surface, turns ONE HUNDRED EIGHTY degrees to rise to level of carb throat, NINETY degrees to position over carb, NINETY degrees to travel down through carb, NINETY degrees to enter runners, and finally NINETY degrees to enter intake port.
Air flow on a V8 with a K&N funnel type air filter and single plane intake manifold: straight down through carb, one FORTY FIVE degree turn and it's at the intake port.
If one must hot rod an inline six at least start with the 225 Chrysler Slant Six or the even better Ford 240/300. Paint it Chevy color, stick a Bow Tie on the valve cover, and keep the thousands in your pocket you world have spent trying to make a lousy design (for racing) Bow Tie go fast. If you're going to haul hay or pull a load then stick with the Chevy. As Dirty Harry said "you got to know your limitations".
