64 cuda trivia & question

The 64 cuda was the only model that displayed all three logos ; valiant, plymouth and barracuda. Mine must have been bumped in the right rear cause when I had it blasted there was some plastic in that area. The problem is they eliminated that logo (valiant) I have it but I can't find the holes (must have welded them shut) Can anyone give me the precise measurements of the holes. It is the lower right on the panel just below the trunk deck.