temp and fuel gauges

Hey everyone. My 76 Valiant left me stranded last night at the race track !! After many attempts to start and a can of ether I got her going and back home. I can handle the crappy carb..easy fix. However now my Temp and Fuel gauge are not working right !! They peg all the way to the max when I turn the car on now. They did not do that before, so I know the 50 key on-key off attempts at starting the car has done something to them. I am no good with electrics....please help what should I do ? I really need a temp gauge at least........