Help setting valves on a 225

I have two slants that give me fits with the valve adjustment. I have used the method of the firing order divided for decades successfuly on other engines, but these! Whew.
One car runs great until hot, then a cylinder or two start to slowly drop out as it warms up. I think the valves are too tight. The other slant sound like a ball peen hammer wacking away. Too loose on one.

I am starting to think that the rocker arms are worn recessed to the valve stem. Then the wider feeler gage rides on the sides of the recessed area, giving a false valve adjustment.

The last time I adjusted a running engine was the last time for me. Hot burning oil squirting everywhere. What a mess.

I enjoy the many amusing responses from everyone. The bent slant was very funny!
Glen