I need a Termoquad kickdown linkage

NAPA usually has a good selection. They have variety packs as well. I run a double spring for my throttle return, one inside the other. You won't want real heavy springs as it will be hard to push on the pedal. I would also suggest a thick gasket under the carb, mines about a 1/4".

Make sure that the spring you get for the throttle pressure rod isn't too long as you want that rod pulled forward to the pin.