What brand of gasket should I use for intake/exhaust

Felpro, victor, and name brand is fine. I wouldn't run the remflex unless I had a big ported head that needed extra sealing. They are a little costly.

They are thick too, so you would have to use for both intake and exhaust for the surfaces to be even close to plane with each other, and possibly even need longer studs.
I don't think Remflex even makes an intake gasket at all anyway.

Use Felpro and you can't go wrong.