If all else fails, go to your local public libary, and ask the reference librian to help you find the correct repair manual with the schematic. Any public libary should have the manual, and you can burn a copy.
TRY FAXON AUTO LITERATURE THEY HAVE THEM FOR A RESONABLE PRICE... I DO HAVE ONE FOR A 68 BIRD BUT NOT SHURE IF THE WIRING IS SAME AS 67 BECAUSE FUSE BOX PLUS ARE DIFFERENT.. BUT IF YOU WANT I CAN EMAIL YOU PICS... RON