Guage help

[mholmes]

I have an '82 Scottsdale that I need help with. None of my guages work with the exception of the speedometer. The gas guage reads only 3/8 of a tank when full and the oil, temp, and charging guage do not move at all. They were like this when I bought the truck. I purchased the truck for the main purpose of pulling my boat 1.6 miles to the boat ramp and back. Plz let me know thoughts and ideas on what could be causing this. I am fairly mechanically inclined so if this is not a complicated issue I would like fix it myself.