Hey Doug, thanks for the heads up, but I've already taken all of this into consideration
I'll be dropping a few of his idiot lights, and setting him up with a custom wiring diagram that will be correct. It'll be a complete custom job =)
The gauge setup I have now has an amp gauge, that will be converted to a volt gauge to be correct with his 81, and I will send him a wiring diagram that he cannot possibly mess up to hook it up safely, and correctly =)