Dave,I am getting ready to change out the steering column in my 65 Chevy.My truck is Caddy powered with a floor auto shifter. I will be looking for a tilt column out of a GM vehicle.That way the plugin for the horn,directionals,etc. will be the same.I have all kinds of room under the hood for this swap,so the length wont be a problem.I imagine your 66 GMC would be similar.
