Well the kit I have, dual plate system is good for 250 shot, I think I would like to try it first and put the money into heads in stead so I can run 10.0s on engine only, and use the NOS to get slapped once and a wile. The Edy heads and a 250 shot would surly do that ? I just don't want to run NOS all the time. Even though I am building a NOS frendly engine I'm still nervise after my last epasode.