Instrument lights workaround?

post some photos. I just went through my 67 Dart headlight switch and found the follower for the potentiometer was not making good contact, I was able to adjust it and clean up the surfaces a bit as well.

In regards to dash light by pass you could do that. you could even buy a rehostat and wire in series ( make sure it is sized correctly)

but modern replacements are available and cheap ( may be cheap quality but for hte price!!) I just googled 65 barracuda headlight switch and came up with many options even NOS and good used.