^^^^^ x 2 id port your stocks to ur riding style, shave your stock head for more comp, do a timing plate mod on ur stock plate.port your stock reed cages. im sure any builder can do all mentioned in one stop. you allways dont have to get new . ''mod what you got '' the pipes u have will work great .with jus that she'll make a noticable diff. if money allows get a 4mil crank first and have it ported for the xtra stroke ............youll be glad you did later. goodluck