I see you posted again in another subject. Hope you find one.
I just spent some time looking through my sources for a '67 AC diagram and came up empty too. I had hoped the old Yellowbird library might have one but looking through the Wayback Machine remnants of her site found no '67 diagram.'' There is a '67 front section and rear section diagrams but I don't believe the AC option is included.
I have a '68 diagram that includes both wires and rubber tubing routes. However, I don't know what changes were made between '67 and '68. I suspect you have already found the '68 version I posted a few years back if not, I'll post another.
As for that wire to the alternator, the '68 has a dedicated 12 ga with an in-line fuse going for powering the high speed on the fan.