User Moparofficial not responding..
The one point the buyer does make that makes a lot of sense is we are on an A bodies site. That valve cover is not for an A body unless you've transplanted an 80s slant into your A body. Personally, I think the seller should notify the buyers in the for sale ad that the part is not an A body part.
Now I can easily see this mistake being made. I've owned a slant six car for over 20 years and I had no idea that the hydraulic slants had a different valve cover. I googled the part number and found a guy on the slant six forum saying it bolted right to his 75 A body and found one of the old for sale ads on this site where the guy states in bold that it is for the later 80s slants.
@71 swinger 225 was posting wanted ads a couple years back for this valve cover. Maybe he could use it?