Indy head conversion questions

I'll throw my opinion out on #1.....

If they were mine, i would definitely clean up the inside of those ports. Not sure i'd go all the way to the gaskets though, maybe half way from what i see in the pics. Main thing is to not get carried away and touch/lower the floors of those ports.

I am curious about what looks like a overlap with the gasket on the outside though? Someone with a answer on question #2 may shed some light on that?