Electronic Ignition on a '47 Ford

[Jrope]

I am currently negotiating on a '47 Ford coupe. Current owner says he had an electronic ign (petronix type?)installed. I then noticed that the car had a 12volt coil with a 6v electrical system. Owner then says the car was converted to 12v then back to 6v again. I don't think that the guy really knows a lot about the car, it's just that all of these mods kind of scare me. I really like the car but I would like a little price cushion in case I have to put a lot of work in it to make it right again. Any advice? I would like to add that I am a member of AACA and the Early Ford V8 club. I currently own a 1951 Ford Flathead V8. I am not very familiar with the "pancake" type of distributor, having never owned one.