I like the idea Beaver53 has. Buy the assorted components and put together your own system. In the long run I want to do something like that with my 50. The challenge will be putting on A/C and keeping it 6 volt, although that's what I want to do. Remember by 53 or 54 GM had a reliable A/C system in Pontiacs and others with 6 volts. I think it can be done. Good luck dbone.
