converting manual steering to power steering

For a '66 model, you can get just the center shaft with the P/S coupler and install it in your column if you can't or don't want to change the whole thing. You'll need pump, brackets, crank pulley, hoses, 90 degree pressure hose fitting if it's a stock manifold 273, and belt to fit whatever setup you get for whatever engine you have. The stock setup that year was a Federal (maybe TRW, I forget) pump with the large diameter return hose. That would keep it stock. The '67-9 setup with a Saginaw pump will work too if you get it complete so everything fits the early water pump and lines up right.