Come on, none of you even ask what motor they have. I've run NOS from Vtwins to V10 and when done right, not much to think about . In most cases it's going to take a wet kit to be safe. From that piont it's math from there.I have set up about 230 or so kits and only when a mistake of running to to has been a problem. If any one needs help you can email me.at hemi2avoid@aim.com. I'll help you do the math grattes