Don’t understand how pitman and idler arm work at spec torque settings?

67 was a double taper, IIRC it was a one year only deal. $$, same deal: the taper will only go so far in then torque up fast, maybe 1/4 turn once seated. I would not suspect that they could be moved by hand once installed as they are tight from the factory. The steering wheel generates >16 lb/ft of torque at the pitman arm with very little turning torque of the wheel itself due to reduction in the steering box. Power steering generates huge torque. Tighten to spec and see if the steering wheel can operate. Only thing we can suggest with given info.