ok i have a couple ? to ask, i have a gsr all stock but with dc header, hi-flo cat., and a greddy muffler. i have been looking and dont have the internet at home anymore but i cant seem to find a 10# pulley, also i thought i seen that a lighweight crank pulley was better than a ls crank pulley ? is that true for upping the psi? also i do have water/alc. inj.