If you decide to go the header route after doing what sunder said, make sure you can find a good header for that engine, as said above, the hedman are a pain, had a set on my scrambler 360 when I first bought it, was one of the first things to go, cheap mounting flanges, etc, never sealed up right, had better luck with stock manifolds,,,,,never needed headers for the jeep, it wasn't a hot rod and didn't do anything for me...