I’m now using those Moroso covers on a set of TF heads, still doubling up gaskets. Only now it’s for rocker clearance with the covers baffles I fabricated.
Felpro makes a really thick valve cover gasket I believe the part number is 1646 not cheap but they work they are .313 thick if my memory still works. We use these on Mopar performance valve covers to keep them from hitting the intake manifold.