I officially give up on the March underdrive crank pulley -- seems to be too small for my application and the charging system doesn't charge enough until 3000rpms... I've been through two batteries, two alternators, and on my third voltage regulator. But I do like the water pump and alternator pulleys that came in the kit. Anyone know of a stock diameter billet crank pulley on the market? I haven't been able to find a March pulley in this stock diameter (single-groove, three-hole) anywhere but I may call them tomorrow. Thanks!