I believe the author of "Fanged" might be S2MS. At least he is the one I learn the term from.
I think there are four versions of the Ford made solid letter valve covers, assuming the covers we are seeing with Ford boxes are indeed Ford pieces. I have summarized in the image below.
Tell me if I got it right or tell me where to make changes.
Hi Jeff, I'd like to add to your "post fang key hole" proposal to "post fang key hole square recesses", also shown as version 3 in the table below. What do you think?
Cory