No matter what the story, they should be black metal inserts. The first thing I did is buy the screens and put them in my non-air grabber hood cause they look good and I figured it would let my engine heat escape better. I don't remember having underhood insulation on my car? I guess I removed it. It's hard to remember some details from 43 years ago! If you want screens and retainers, I have some. I would get the aftermarket AG box too...for the cold air! That's one non original option that does not hurt the value of the car in my opinion.