Not a fan of contemporary cars seats in an older car when they don't redo all the seats so they match. Stock black vinyl rear seat and light gray Honda bucket seats in the front is not a great look on an old car interior.

Also, nobody does this much these days, but I've seen a number of older cars/trucks where people have cut a big hole in the roof for a 70's sunroof. I still see this on El Caminos and Rancheros around here for some reason.