You can always mill or turn the pistons down a few thou to get the deck height where you want it if you did groove a slot on the deck.
No need for new pistons.

I am telling you guys,if you get zero or close to zero deck,you will be able to run higher compression.
It's all about having a good or proper quench.

Not sure if I ever saw a street 6 cylinder engine get a groove in the deck from blowing a head gasket & I have blown a few with nitrous & did not have any grooves any of those times.

I suppose you can get a groove if you continue to drive it w/a blown head gasket?

MBHD


12 port SDS EFI