14 GA or 16 GA Fusible Link?

We have a 1965 Plymouth Valiant Signet Convertible with no accessories (manual steering, manual brakes, no A/C, no radio) just has a heater, horn, and 6014 headlamps (factory were 6012). However, evidently a previous owner installed a radio which is now missing (but there are dual radio antennas installed on the two rear quarter panels.

I have my doubts whether or not the firewall fusible link (bottom in photo) has been replaced with a fusible link or a straight wire so I plan on replacing it now. I have found two fusible links in my stash of electrical parts: one is labeled 14 gauge (center in photo) and the other labeled 16 gauge (top in photo). Which one was factory installed and which one is recommended by my brother Mopar forum members? Thank you.

IMG_0496.jpg