I bought my 67 harness from Year One. I'm surprised that they don't have them now.
When I got it I spliced in the eletronic ignition and the dual field alternator with the eletronic voltage regulator.
I don't suppose you would still have any part numbers that I could give to year one??
The part number they gave me for the '68 is HU258A but I don't know if thats for the engine or the forward lights.