65 Dart Wagon

So I have been doing a little research. (nothing else to do at work is there?) I ran the Vin through a decoder and it says the wagon is a 170 but the dash emblem says 270. The fender tag is missing. I'm not that worried the vin says it is a /6 and the engine and tranny are not original anyway. This was never about building a factory perfect show car. I am not even really concerned about resale (don't tell my wife though, I keep telling her we can get all the money back out of the car if we want to) I was just hoping to find out the original colors and options if I could. I think I might look for any build sheets this weekend. I still have to fix the gauges too.
I read a couple of places here about using Ketchup to clean the circuit board. Is that right? It sounds a little crazy.