Jeep 4.0 in 69 Barracuda

Look on line for original paint colors for a 69 Barracuda. That stuff is posted. Once you have it narrowed down visit an automotive paint store that has been around for a while and they may have a catalog of Chrysler paint samples and formulas of colors.
To get a good look at the original car color: door jams, inside the trunk, under the hood would be the places to look.