I'm helping my brother get his '69 4520 running again, but it has some issues. The fuel-shutoff solenoid was bad, and we replaced it once. It promptly burned out. The store replaced it at no cost, but I'm reluctant to replace it until we eliminate any reasons it may have burnt out in the first place. When I check, the lead to the shutoff solenoid is only getting 0.8 volts. I can't find any tech manuals that show what voltage it's supposed to be getting, so I assume it's 12 volts, no? I could install the new solenoid, but I don't want to risk burning out another $120 part. Also, the alternator becomes hot to the touch in short order. Help me Obio-Wan-Kenobi! Tell me what has to be replaced.