engine math! milling heads + intake

True they didn't flow well in stock form but with a little work they can and will perform like the 360 heads with the larger valves. I did use the 360 exhaust valves in the 318 heads and this picked up the Tq a good bit when I did this. Mind you I'm not a fan of using the larger valves from the 360 on the intake side in the 318 heads for street use. As the smaller ones will give better throttle response and more Tq.