before you go too far, have look at the fast idle ball stud on the advance arm... look for a track in the dirt where the diesel shop may have moved it.
If it's not been disturbed, set it so you cold gap to the advance arm stop is like it was in your before picture, and you should have about 1400 RPM cold idle(once its engaged).
engine running, internal pressure counteracts internal spring on advance ring, by 2500 RPM, you should be able to pull the advance arm with your pinky finger to engage the CSD.
If the lever is not easier to pull with engine on, pump transfer pressure is probably low.
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