I'm confused about some auctions I've seen on eBay. This ad says it is for a NOS GM Hood Insulator, but it is an 8 hole insulator. I thought all of the Turbo Buicks had 9 hole insulators, even though the ninth hole is not capped...like this one. Can someone sort this out for me? Also, what is a more realistic price on a 9 hole piece when they come up? Thanks.