In my opinion, I don't like the chevy exhaust port design. The 2 in the middle has got to store alot of heat near the center of the head. Plus the length of 2 center header tubes is shorter than the outer 2 per head. So I don't even know what that would do for backpressure. Are there any benefits to this design that I'm not thinking about?
I like the Ford ones better. Everything is spaced out evenly. Looks better, probably cooler. Still not sure about the ramifications of backpressure, can anyone explain?