Cable-shift Torqueflite - ’64 vs ’65

Nope, you should be fine. Other than the slip yoke vs. ball & trunnion, the only difference is the valve body. '65 will work in a PB application, just not the other way around. Be sure you grab the yoke along with the trans, they're a one-year only item, and kinda hard to find. I've heard tell that the later ones leak in a '65 trans, but I've never had to find out.