[Brentwood Bob]

Suggest you check the contact point where the ground cable is bolted to the cross frame behind the battery. you need a clean, bright metal to metal contact and I have added a stainless steel star lock washer for added insurance. With the modified ignition and the alternator add an auxillary ground cable from the same anchor point behind the battery routed over to the transmission tower. The alternator does not work well if there is a loose electrical connection, especially a bad ground.