Need some advice on some cylinder head gaskets

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.

I didn’t see the pistons deck height ! It does give you the deck height of the block, but not the pistons that I seen !