Check out THIS 'ol lady, and I admit, I'm tempted

RustyRatRod said

I've sold plenty of 8V golf cart batteries, and seen some positive ground systems. I owned a Triumph Herald for a short time with positive ground.

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Back in the day, putting an 8V battery into a 6V car, and jacking up the voltage regulator was one way to get a little brighter lights and better cranking out of a starter. "I bet" it was for sure harder on light bulbs.

(Bear in mind that just like 12.6V systems actually run at nominal 14V, 6V systems run at 7V. So that's "run" voltage at about 2.33V per cell. That means an 8V system should run at about 9.3}