You're right about damaging the pedestals Mike, cracking WILL happen and usually just by torquing the shafts in place. When I built my first stocker engine I tried to get both lifter preload and geometry corrected using .015" shim stock and while it 'sort of' worked, it wasn't long after I noticed the tell-tale crack in the pedestal... oops! That was back when we HAD to use non-adjustable production rockers according to the NHRA rules at the time, hmm...back in the ice-age?! It didn't take me long to figure that wasn't the route to go, but the crescent-shaped shims are. Unfortunately, I no longer have access to the machine tools needed to reproduce these or I'd be making and probably selling them myself.

There's a real good article on the B3Racing page about geometry and good information as well. The sweep is one of the more important items not only for efficiency but parts longevity as well. Thanks for the heads-up fellas, much appreciate.