Kixkdown and throttle cable

You could also try to find a factory '65 4bbl A-body kickdown setup. With your aftermarket intake, you may still have to slightly modify something. Same goes for some aftermarket carbs. The differences between the factory 2bbl and 4bbl are mainly the bell crank that bolts to the back of the head, the throttle cable bracket, return spring bracket, and the threaded forward rod connector. The actual rod is the same. As mentioned, the throttle cable is different too. Re-bending, cutting and changing lengths are what would be needed to convert one to the other. The '66 setup should work with the same mods possibly needed too, but, it's slightly different than the '65 setup due to the change in transmissions from '65 to '66.