I've owned my '67 Coupe for only 1 month. The car wouldn't hit passing gear, so I bought a new kick down cable. With the cable adjustment as short as it will go, it isstill 1-2 inches too long.

I'm assuming that's the correct C4 transmission. I wouldn't think the throttle linkage has been replaced or modified. The cable I bought matched the one that was already on the car (come to find out, there was no need to buy a new one).

Did Ford make kick down cables of different lengths?

 

When I did mine (on a 68) the kick down lever on the trans was very short, so I set it at full travel with the accelerator at wide open throttle. When the accelerator was released there was about an inch or so of slack. IIRC.