Roller Rockers Geometry

Your geometry looks a lot like mine does and mine run nice and quiet. I buzzed my engine up real high on the test drive and they are still nice and quiet. You just need to make sure the center of the roller stays away from the edge of the valve stem. It looks like it does from what I can see. Just make sure there is no lash in the lifter when you check it.

Hopefully you'll get a nice scrub pattern when you check it with the magic marker. When I checked mine I used a check spring and held the roller tip so it didn't roll. That way it would wipe away where it contacted.