Need some advice on some cylinder head gaskets

Yes it doesn’t give you the deck height of the pistons ! You can put the piston on TDC when you pull your heads off , and measure the deck height then !

ICON Forged Piston - Chry 408 Rod 6.123 Step Dish +20.5cc 2V Kit W/Rings

I doubt the bore size makes a difference on the piston head, but this from their website.