With 4 head screws or studs per cylinder, I would remove a minimum from heads and/or block. Buy the correct pistons to get your desired compression ratio.
Forged pistons look to be the same compression height when shopping.
They say a KB-107 is still .012” down in the hole-hence milling needed to begin with.
I want to optimize compression, not just let it go-compromise the compression with simply putting everything together as is.