Just as confirmation from the Buick/Olds world, none of our tails will fit due to the changes in the rear quarters, deck lid, rear header, bumper, etc. It was one of GM'* tricks to use the same frame for all of its subdivisions, but to change the sheetmetal to fit different style sheetmetal like quarters and fenders, etc.
Anyway, if you go junkyarding and find a nice set of tails, then it won't really matter what they came off of as long as they match. But... personally I'd stick with the SSE tails as I think they look better.
RIPBC... Off to bigger and better things