I would order the correct year one kit and be done with it. You must have something. If you have some aftermarket carb and intake combo, you might look into the bouchilon cable kit.

Adjust so the lever is all the way forward at idle. Tune the WOT shift point with a governor kit. Get that from A & A trans. They make several for different rpm ranges. Easy to install in tail shaft of trans. Some people will try to raise the wot shift by adjusting the kick down, I always found that to make for a funny shifting trans overall.