The heads have been blasted and I see no other numbers anywhere  The 60 A and the C69 are under the headers They almost look like they are on a tag and screwed into the head but I can not unscrew or pry the off. the heads are on a supercharged race motor from the 70s did Ford make any HP aftermarket heads? 
  

The "Tag" is the date code.  That code is usually in the format year, month, day.  The letters and numbers you posted don't make sense, though.

Can you post pictures of all the locations these numbers should be, as well as the date codes?

There were no Ford aftermarket HP heads.


Lawrenceville, GA

Ah!  this is weird. In some cases references to numbers, for instance for 1957 heads, should read "letters" such as ECZ-G..  
And there are no 1970s Y-Blocks...


Paul

I have pictures on my phone but don't know to send them I will see what I can do thanks.