The headlight switch internal guts changed to accommodate the parking lamps being on with the headlamps on, but the wiring did not. At this point, if you have a 67 headlight switch, use it and don't worry about the 68 configuration and vice versa.
The turn signal switch connector on 65-67 consisted of a square molex pin connector, but in 68, it changed to a curved dual row connector. The actual wires and number of them did not change, only the connector.
Take three aspirin and call me in the morning if you still have the headache...