You mean “almost” std port openings.
Hopefully the amount he has raised the roof at the opening doesn’t create an issue when trying to use a std valley pan gasket.

Personally, I would have opted to keep the opening truly “standard” for gasket compatibility, and not worried about the very small increase in flow raising the roof opening that about would get you.

I have gotten 350+ out of a std port head without modifying the opening…….. so I know that size opening will support that much flow.