Welcome to the board.
I don't have charts for '67, only '63, '68 & '69. Some years they changed interior codes, sometimes they carried over, and some color codes like black tended to span several years.
Another thing is that there are usually 4-5 different codes for the different surfaces; if your car is original, you can see the variations.
Unless someone can post their '67 info, I'd suggest you shop Ebay for 1967 Plymouth color charts, and make sure the Seller's charts also have the interior info, as some charts don't. Typically DuPont charts are the most complete. Their library is also pretty good for comparing the old #s to their current products.
Look around your area for automotive paint suppliers, or ask a local quality body shop who they're buying from.