I just got a crank pulley from Unorthodox. I was wondering if any of y'all have installed it before and could give me some tips before I go and do it. I bought it used but appears to be in great condition. I do notice 3 etched marks on the alternator and ps. What are those and does it have any signif. when installing. Thanks for any help from anyone. For the ones who do have them, any dyno numbers-chassis, butt?