Super Six vs. Standard Six.......

There are a couple of stories regarding how many horses you get out of the swap, one thing is for sure, its worth it.The first one I did was on my 68 d100. I just about doubled my gas milage. It went from around 13 to around 22. Power increase was nice, especially in that truck. The bigger exhaust is a large part of the equation. More air in, more air out. Planning on the swap yourself?