Couple things,
The Richard Petty- Talladega pic is very early in 69.
Nascar did not let Ford run the Boss 429 engine early on as not enough Mustangs had been built- sold yet.
Been trying to console "OLE BLUE" as the lowly L78 did not even get honorable mention.
I can see a lot of stuff on the list that would have problems against an L78.
All tounge in cheek
and we will not be scrapping "OLE BLUE" anytime soon