Any suggestions as far as the max safe rpm? (Hopefully higher then my cam will make power), other tricks i can try go.get more power before I make the.trip ( 400miles) to the only dyno in state? Iv been considering a new.intake, air gap or.single.plane maybe? Whatever mods i do tho.I don't want to hurt mpg... car got 23mpg on its.first 500 mile trip.