I just completed an engine swap. The old alt was a GM 1-wire, the new one is a Mopar (Powermaster) 1-wire. All electrical systems were fine before the swap with the ammeter showing slight + while driving, & a slight bump of the needle when electric fan or lights came on. Now when driving the needle is half way (or more) up the + side, and I don't think the battery is charging properly (the starter barely turns over after a half hour drive). Where do I start looking first?