Ok I put this MK1 pulley on and it starts runs and idles 200% better than with the wiggly one I can also tighten my alternator/water belt finnaly . For funsies I checked the timing {put a new mark on the mk1 pulley exactly where the stock pulley mark was} It was at 6btdc and now it rests at 10btdc without advance and when I started it with advance line still on it was off the scale completely I guess 18-20 btdc. It runs fine and I think the mk1 pulley was slightly bigger {underdrive} which would explain why it is so off or did I do something wrong and should throw it back in perfect time thanks in advance Travis PS these pulleys look awesome and perform good but I got to thinking how long can a alluminum pulley last without warping I hope almost 30 years like the stock one