Sealing up valve covers
I always check the vc naked on the head, looking for wobbles side to side or end to end. And I chase the vc holddown bolt holes, (if I'm not using vc studs, which I usually do). Rtv or sealer in the bottom of the boltholes can give false torque readings.
Then I use gasket cement of choice to bond the gasket to the cover, and then use bigger wider load spreaders that I make myself, out of 1/8 aluminum. The spreaders are necessary on the stamped aluminum (paper thin) moroso covers.