Reply to "377 Cleveland"

I've got the 4v heads on my Pantera right now. They have giant sewer type ports, but actually dont flow that well. Large ports dont necessarily mean good flow. Remember, these heads were designed in the late sixties, and were good at the time, but pale compared to the higher tech heads available now. The 4v heads are notorious for soft bottom end and midrange power. The 4v heads have 270cc ports, but dont flow as much as the 185cc, 208cc, and 225cc aluminum heads offered by CHI. The ports are obviously smaller, but by design they actually flow more, and more importantly, have a much higher intake velocity. This is what will really wake the motor up. I'm going with the 225cc heads on my 408 Cleveland, as well as their intake. Check them out at www.chiheads.com