EFI Bung in head update

You ran through the same casting number years ago in another thread. You believed it was a very early 60 head (oops block casting number was discussed) back then too. It has no alt tensioner hole up at the upper rad area (as the alt was on the pump side back then)AND it has no upper (3rd) alternator stand bolt hole that bolts into the head (as it was not used yet). There is no meat up top either for a bolt so Ill have to make a little 90 bracket off the stat housing bolt for the tensioner.