Ah, the windward side. Most beautiful part of the island. Loved Kailua Beach Park! Best beach on the island imo.
Good luck and welcome! I've got a '70 as well and was just decoding my fender tags for more information. I think that your question on the black striping refers to the V5X code, which some sites call it black striping and some call it "Black Mouldings - Protective Insert Body Side".
Welcome! We do have other members from Hawaii too!
Looks like a fun project. My wife and I moved from Waikaloa to Florida. Rust is a problem In Hawaii, but it is just as bad here.