Yes, I get movement via the bottom duct. I usually pull the vent knob on the left next to the hand brake. The door on the passenger side just feels hot so It stays closed. I am finishing the restoration of the factory unit I have and waiting for the return chrome compressor, idlers, power steering pulley, power steering and alternator pulley.
The AC set up requires the change to the 7AC GT350 power steering pulley single groove alternator and C5 crank pulley. I guess I'll set all the originals aside in case I need to return to stock.
-Keith