How do I find the original paint color for my 1977 c 10 scottsdale. It doesnt tell me in the vin number which is ccl147z173754

Check to see if there is a metal tag riveted to the door jam on the driver's side on the door post. This may have the code for the paint on it. You also may craw under and see if you can find any old metal rails or parts that has not been re-painted to find the true color. If it was done by a quick job paint shop, there will be some parts not painted if you remove the chrome strips or even around the hood areas. Take off the rear lights and see if old paint can be found. It will be a treasure hunt.