I just got my hands on an old Hitachi radio that supposedly was the stock AM/FM radio in the 73-76 Z car?? It supposedly works but unfortunetly, I do not have the plug and colored wires to plug into the back of the unit and I can't seem to find any info or parts or schamatic for this model anywhere ( even online????) .I figure that somebody out there must know something bout this radio or at least enough info so that I can build my own plug and color code the 6 wires ( + the 3 wires for the ante