Thanks the combo is a stock bottom 318 mild ported 302 heads 340 intake 600 cm carb and the cam is still up in the air but lets say a comp cam xe262h cam stock TC with 904 transmission and 2.76 gears. I am just curious I have every intention of using the headers just curious if the larger cast manifolds would flow better on the smaller port 318 engine. I have some concerns about the headers one ground clearance two heating issues in the engine bay three installation issues iv read all the horror stories lol
