I was offered a good deal on a complete 68 wiring harness by another forum member. Other than the bulkhead connector (bolt vs clip), side marker lights, and lack of hazards in the column in my 67, is there any major differences in functionality? I've been searching for hours and can't come up with a definitive answer. My car is a restomod in progress, using an EFI harness that handles all engine functions including alternator. Just need to know if I can use it fairly easily without cutting the firewall, etc.

Thanks

You pretty much have it. I've compared schematics of both '67 & '68 and alittle difference in OE volt reg hookup, I don't know why, I suspect the same for both still.

All the same...

He'll have to change the ignition switch and lock cylinder to use the 68 harness since the plugs are different.