That is not an original hood pad it’s a reproduction. Originals are molded to the bottom of the hood webbing shape and have no numbers on them.
My car was an unmolested neglected survivor. I knew the owner and he didn't do maintenance like replacing hood insulation. If anything he would have ripped it out.
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I am pretty certain that the hood pad as pictured is the generic style fiberglass pads that were sold prior to the more correct molded pads became available. They still sell them as an alternative to the molded pads. Also, hard to tell, but it appears that the attaching clips are the plastic style which was first started back in 1973. For cars this old, it is hard to say what all has been changed through the years.
I have only seen one NOS molded hood pad and had no numbers printed anywhere on the item.
Sorry, the hood pad in your photos is a reproduction. Your story sounds good but the picture tells the story. Here is a (Bad) photo of an original. Notice it is molded to fit the hood ribs. Notice to bottom edge is very straight and your is wavy. It has no smooth top layer Like yours and no printing on it.
A little bit about my level of knowledge. I’ve been into these cars since 1984. I went to junkyards in a large metropolitan area regularly to find original parts for my cars. There were plenty of 4 door cars there. And there was going to be more cars arrive next week. There were very few reproduction parts for 66-67 B-bodies made in the 80’s. I’m not making this stuff up.
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