I am working on insetting or frenching my 70 cougar taillights. I haven't seen it done, so it'll be a chore.
I had those, but I have a set of 70s. And they have an inverted look that I think is a little smoother. We'll see I reckon
I think it's a good idea. I have seen them just mounded on the surface. To me it looked ok but a little too bulky. Recessing them should make the look better.