Heo,
These molding kits were actually a FoMoCo parts accessory item sold over the counter at dealerships back in the day. I was a Ford dealer parts and service employee from 1975 til 2000, and I can tell ya Ford offered kits for many models throughout the years. Some were kind of goofy looking, to be honest. Sadly, these came before my time ---wouldn't it have been nice to see into the past and pick a bunch up --for all the more they probably were back then. ? lol

If I remember right, part number on the 2dr kit would have been: C4AZ-6221048-A
Attached is a pic I found on eBay of a 4dr kit, including original shipping tube, instructions, etc....
Ford also made nice molded door edge guard kits for our cars !
Oh, and my '64 was built right here in the Twin Cities plant (St Paul to be exact), but it spent most of it's life safely away from the rust belt down in Missouri. It's an oddly equipped car to boot, lol ---- bumper guards, white vinyl top, am/fm radio, lower b/side moldings plus rocker mldg, but yet it is just a 500, with a bench seat, a 4-spd, and manual EVERything, lol.
Sorry Greg for hijacking your thread --thanks !

Norm