The "ears" were there and in those days they lined up with the valve cover cut outs.
Newer versions of the gaskets have changed the locations (think it is to fit the more modern cars) of the ears/tabs
Some just continue looking for gaskets that match or transplant the ears/tabs to the original locations from what I've been seeing
Sorry can't remember where I got the last set (for Dan's 69 GT350) from
Might have been an old kit or originals/Nos