I have always like doing "different things"..... which was one of my main reasons for trading my El Camino for the Opel.
No matter what I finally decide to do with the tail lights it will not be "radically custom". Both of the stock tail light lenses on the Opel have "cracks" so changing to "different" tail lights" will serve "two purposes".
The rear hatch lid, as well as the rear fender gives me "plenty" of options for placement depending which style of tail lights I decide to use.
I still have some 62-67 Vette tail light housings & lens. It would make sense to use them so I don't have to buy others.