Air conditioning system 1964-1966 complete unit Custom a/c, heat, and defrost. this unit mounts directly to firewall where all a/c and heater lines route neatly through the square factory inlet hole using a custom rubber grommet. this system has been disigned for easy installation using existing factory firewall holes and condenser and drier assembly with custom aluminum lines and mounting brackets. 1964-1966 with pull knob heater control.