I dont know Red, this has me baffled, but then again thats pretty easy..
All dad and I wanted was to put the ac box and heater box in to cover up the big hole into the engine bay. Of course we wanted to have the blower mtr work and be able to direct air flow to where we want it. Dad got a ac/heater core gasket kit from DMT when he bought the car, so we figured we may as well use what we could.
If you see the link that 67Dart273 put in his reply, that is another thread I started a while back, and in that thread(as well as here) Del posted an elec schematic that is different than the one that dad and I were using....both 67 schematics, but it looks like a change up...more like a frickin knuckleball to be honest...Im not sure what to do at this point.