A-460 Block and A-460 Heads

All,
Do all A-460 blocks have the holes for the extra head bolts/studs? Or is that just the newer versions? Also how do the older A-460 heads stack up against the newer TFS A-460 casting?

Thanks

They'd have to be very old not to have the 18 bolt deck.

Not too sure how old my first A block is, but it doesn't have the 18 holes.  Ford must have known they were going to do it though, because there are bosses cast in that early block for the holes.

my block is somewhere from the 90's no bosses

Ace