Adjustable rockers adjusters problem?..

YR,
Pressed the wrong key before adding I clearly stated in post # 57 the BHs were for spring CLEARANCE, not to fix geometry.
And speaking of 'geometry', I do not see anywhere that the OP was unhappy with the rocker contact on the valve tip, only that he was having issues finding suitable adjusters for the rockers.

And you have probably got it wrong with your statement 'the shafts are too close to the valve'. If you meant the rockers are too close to the valve, & hence spring contact with the rocker, it is quite possible the spring OD is a tad too large. There will be a limit with some engines as to how large the OD of the spring can be.

Geometry isn't just about contact patch. It's also about the relationship of the rocker to the amount of lift the valve will see. The stock rocker location is almost always wrong, especially with aftermarket cams. The shafts always need to move up toward the intake side of the head. How much depends on the rocker and the cam.

BH's may gain clearance, but would be an expensive bandaid fix vs rocker arm shims which put the shafts in the proper location for the cam. The proper location would negate the need to grind rockers for clearance AND ensure better valvetrain control. Win-win.