Yup, gas jets are what you'll use. Alcohol jets are the same, just bigger sizes. For a starting point, go up 2 sizes, if you are running 66 jets now, go to 68's. I do suggest the initial tune be done with an exhaust gas analyzer to see what the mixture is running, ideally you will want it at 14:1 throughout the RPM range. I usually check at idle, then at about 2500. The analyzer will save you a lot of time making test passes and reading plugs and IMO it is a lot more accurate. It can be done by reading the plugs, but the only accurate way to get a plug reading is to install new plugs....gets a bit spendy after awhile..