There's a lot different between 67 and 69, including the location of the horn relay and the way the wires run to the horns. Yes, it could be made to work, but it would be a lot of work...
Actually the horn wire routing is the main difference isn't it Jim? There also might be a few wires in different locations in the connectors but they can be moved real easy to the correct position. I guess since I'm an electrician I don't see it as a lot of work modifying it. For the price I offered it to him (just what I have in it) I thought it would be worth the effort. Of course, if he has the money for the one davescuda has it would be his best bet since it's year correct