Paint Color Help

[DSGBraves]

Im getting ready to paint my truck and i need help figuring out what the originla color is. First i need to know what color white the roof should be. In my paint book theres Neutral, Polar White and just White.
Also the truck is a 1980 k10 silverado. it was brown. I think its cordova brown, but it doesnt show that color for 1980. theres brown met. and dark camel met. in the color book. the code in the glove box says 001 special pant ca. this is a picture under the carpet, thanks.