These funky rocker boxes were slightly warped (especially on the little center boss) from most likely a variety of causes, ie; heat, sanding, polishing, etc. You want them flat against the gasket surface so you aren't binding or pulling when torquing the rocker bolts. After fly cutting, a fine burr was removed.
These Strociek rocker arms were touching the upper collars slightly on the exhaust. I first checked without the gaskets . . . we'll be ok with that extra gasket height. Assemble, check, disassemble, clearance, reassemble, check, disassemble, clearance, reassemble, check, disassemble . . . etc etc . . . . I'm buying common stock in the Sharpie Marker Company (which I use instead of bluing)