Need pics of stock '64 225 carb/kickdown linkage.

No. "Factory air" in '64 was just factory installation of the same under-dash add-on A/C unit you could get installed by the dealer. New for '65 was a combination A/C + heater which covered up the area of the firewall where the rod would go through, necessitating the cable. Your '64 would've come with the rotating-rod setup. Here's the '65-'66 factory-air linkage setup. If your car has this, someone put it there after the car was built.

Screen Shot 2017-12-06 at 11.44.43.jpg