Then that’s a bad design. The PRW stainless steel rockers I run oil through the cup adjusters like I mentioned above.
Also, weight on the cam side of the system isn’t really that critical. It’s the weight on the valve side that is critical. That’s why the GM guys are busting their balls to get a .904 lifter in the blocks. A bigger lifter (which weighs more) can run a bigger roller wheel, which allows a axle and needles or bushing.
@lead69 and I will be building a SBC that is getting .904 lifters.
As for geometry, the bet thing is t read the tech pages on B3’s web site. I do know just shimming the shaft isn’t the correct way to do it. If the shaft goes up it also has to move back away from the valve or you didn’t do all the work of correcting the geometry.
Those cheap assed shims that Hughes and Mancini sells are just that. I’ve seen shims like that break the rocker stands. The only good that came from that was that to save the head you had to mill the stands down and use blocks.