Dave: what about changing the alternator fan? First, is it actually set up to blow the right way, which is air moving from back to front? Second, some alts can take different fan types: an alternator rebuild shop can tell you if a higher airflow fan is available that can be fitted to your alt. The following is an extract from Steve d' Antonio's blog earlier this month: "....check the installation to make sure they are equipped with the correct fans (there are bi-directional, straight fin, and mono-directional, slanted fin, fans, if the latter, and the incorrect rotation, they can lead to overheating). Most engines are counterclockwise rotation (when viewed from the flywheel end), which means the pulleys on the front turn clockwise, as do the alternator fans. If the fans are the mono-directional, slanted variety the fans should be turning with the scoop side away from the direction of rotation. Counterclockwise alternator fans are rare, they are designed for clockwise rotation gasoline engines, however, and there are thousands of them out there, so this is a possibility that should be eliminated. Fans should draw air through the back and then center of the alternator and expel it out the front." You just changed the belt arrangement....did the fan direction change too??