You will also need the mill to do the gasket surface on the bottom of the runners and the top if you want the top removable. I have one on mine seems to work good but really have nothing to compare it to since I run alcohol injection on the tunnel ram and ran a gas carb on the single 4 intake. I was able to do all the machine work and welding myself. They also need a lot of work in the runners as they are cast straight with little to no taper.