LOL saying "so gay" this day and age is pretty gay too. There's only so many letters in the title bar. Was trying to conserve them. Pretty sure everyone would know what car I was talking about if I hadn't mistyped "17" instead of '71. And if Chally (which I don't actually use either) keeps someone from replying, then screw 'em.

Thanks floyd for offering actual useable info. Got the two sizes part (yes inboard is the tall one) and the foil back though I am looking at replacing it with pieces of modern retroreflective tape. Going to test both and see which one does better behind the lens once I get them cleaned and polished. Also saw how the factory did it, just wasn't sure what they used to get it to hang on there for 50 years. I was trying to avoid superglue because the fumes have a habit of creating haze on nearby plastics. I take it you didn't have any problems like that? Are their different thicknesses of mounting tape out there? I tried the mounting tape option on one that is currently on the car but it was thick enough to make it sit out too far from the rest of the tail light surround for my taste.