One wire alternator.

I'm probly going to go with the 60 for safety. The battery is in the trunk and I have a disconnect switch. 67Dart273 and 70aarcuda, I can see both of your points. The last one wire setup I dealt with either came with instructions that said to run the wire to the battery or the hot side of the cutoff switch so that when the disconnect got shut off, the alt would not keep the ignition on. I raced it at Lebbanon Valley and the tech inspector had me start the engine and he hit the disconnect and the engine shut off. At that time this met the rules and I never had a problem with the setup. What Dart273 is saying is we're lucky we never had a short or some condition with uncontrolled current flowing and causing a catastrophy. I'll check out the NHRA rules and see. One solution I thought of for simplicity would be to add another disconnect and set it up to work in conjunction with the battery dis and use the additional switch for the charging wire.