A couple of 69 barracuda questions

So, I am about to start putting my formula s together and had a couple of questions. First, I have one of those new 69 repop tail panels and a round, nos formula s emblem and was wondering how to put it on. The emblem just has two studs(with no threads) and the tail panel has no holes. I seem to remember seeing a factory tail panel and the two, short studs looked to be ground down and "mushroomed" over to hold it to the tail panel. Has anyone done this? Seems like you get one shot only at it and these parts weren't cheap.
Secondly, I had a question on dash bezels. My car was a wood grain dash car with the bottom portion painted black. Most of them I've seen wood grain or not, the bottom portion and the glove box trim are silver. Any ideas on why some of them were black at the bottom? The car I'm doing was parked in 1976 so I'm fairly certain that the bottom of the bezel was originally black despite some arguments from some friends. Thanks for ready this long winded rant. Any advise is greatly appreciated.:prayer: