Rocker arms for 408 build

If it was me, I'd evenly machine off part of the bottom of the pedestal, like maybe in the range of .050" to .100", and then come with a set of shims to put under the pedestal and lock them back down with the bolt like in the original setup. Adjustable, but retains the stability. Slow to adjust? Sure, but how often do most of us do that?

Optimizing geometry is another matter.....