Aye - and new bolts have been installed ! :)
Turns out that they are TTY bolts - and as per the page TopGhia linked to - Flanged bolts are TTY . . .
Hrmph . . I ended up paying $140 at ford for the new bolts
In the next week or so, I'll write up a review of the head change process . . . with some of the tricks & traps to watch out for (Belt Tensioners suck major ass :( )