MP valve covers.........

I got'em. Outside height or inside the cover height?

The valva cover lip is 3/16th thick.
The height of the valve cover as sitting on my bench is 3- 1/4 total height (Just crazy shy of it), including the rail lip of the cover.
So you can minus 3/16 from the 3-1/4 for actual height as sitting on the head without gasket.
If you gasket is 3/16th thick, then total height is 3-1/4.