The later ones have some pretty huge chamfers, some of which of course goes away when you deck the block. In an extreme case you might need a head gasket with a larger bore so the fire ring doesn't overlap the chamfer; Cometic offers them but they're fairly expensive.
Hopefully you have the complete motor and can look at the old head gaskets & heads to see if there were problems; but with 440 pistons being so far down in the hole on the later motors with the large chamfers, the decks need to be milled a fair amount anyway.