Stop in for a cup of coffee

You're going to be the expert on bumperettes!
For 73 to 76 anyway. I think I have them pretty well figured out. A lot of misconceptions about what interchanges for sure. I can tell most from a picture now. Not that it matters for mine, but I found some labeled as 76 that look similar but apparently only used one bolt.
Still a few differences I would like to iron out just for fun. LOL