You can go as tight as .050 on the intake IF you are careful. And .080 on the exhaust IF you are careful.
If you want a little margin add .020 per side and send it.
Now that that’s said, the truth is most pistons come with valve pockets far deeper than they need to be.
I’d be surprised if you don’t have .200 or better on both sides. Check it, but don’t be surprised.