Rico/Doug:
You could check here.......
Ford casting ID numbers and part identification info for Mustang Shelby parts
might help,but it is for older parts, or just take pictures of all the number/letters you can find on the head and post them here,or go to a Ford dealer parts department with them, they could look up the numbers.....
Your heads look like some late 80's to early 90's Ford aluminum heads, possibly J302 heads,which BTW are pretty good.......
Back then,Ford did have a fair amount of over the counter performance items for small blocks.....
David