dry paper oe style gasket.. nothing else.
the only other possible mod I would do is have the cover cut for an oring that then sandwiched down onto the deck.. I have seen a fergy with a deck cut oring boss.. etc.
still.. I've done plenty N with paper gasket and have never had to go back in as long as the deck and cover were clean and smooth there.
remember if you put a metal crush gasket around the port.. the cover will not set true, making the outside of the cover be at a different angle, and thus encourage blow out.
the engineers covered this by 1939.. no need to reinvent it.