Jump Starting?

[VeryTangled]

Hi Everyone!

I think I've almost had enough fun fiddling with the chassis grounds, coil, distributor, generator, wiring harnesses, lights, horn, starter, fuel sender, fuel gauge, and ammeter in our car.

I was wondering:

What are the dangers and techniques for Jump Starting an old Ford original 6v positive ground, generator equipped system with a 12v negative ground alternator equipped modern vehicle?

Is there any device that can be used to make this trick safer for the vehicles?

Do you need heavier gauge wire in the jumper cables?

Is there such thing as a 6v jump box? Reading some message boards seems to indicate they may not be. Would carrying a 6v motorcycle battery be a substitute for a similar 12v jump box?

In auto-shop, we teach to hook the fourth connection from the good negative, to chassis ground on the dead car. This hardly ever works because of poor grounding. And grounding in the 6v system is even more important, isn't it?

-VeryTangled/Jeff