Now I have a question regarding this same pan...I have a 1968 400 that came with it (or one very very similar). Mine was badly beat/bent/twisted/rusted/dented. After seeing that the repops were fiberglass instead of sheetmetal, and seeing the prices, and then this post of it being a possible rarity, I decided to straighten and restore what I have and reinstall. And it now looks really good!

My only question is how exactly do I attach it correctly to the car? This is probably the 3rd resto on this car, and the last guy to attach this pan used a random cocktail of nuts/bolts/washers from his coffee can. I think I used 4 different wrench sizes to remove it, including a pair of metrics LOL. So at the VERY least I will go to the hardware store and make all the fasteners the same, and SAE! But does anyone know if these were factory-attached with cage nuts/clips? If yes were the cage nuts on the holes of the valence (which means they need to be bolted from the inside and threads would point down out of the bottom of the valence...doesn't seem right), or were the cage-nuts somehow in the u-slots of the baffle (see the last photo immediately above from Amervo)?

Or...were they actually just thru-bolted with loose nuts/bolts/washers/lock washers, as I had removed from my car?

Any insight is appreciated! Of if someone knows of a repro attaching hardware kit for this piece I'd be curious what they provide...