Thank you, guys.

The pintle ball was in good shape when i had the injectors out last. Guess I'll start collecting tools to remove the prechambers.

Another couple possible symptoms came to mind. It's had gray smoke just about the entire time I've owned it, hot or cold. It's gone away for a while after having the injectors rebuilt and after the diesel purge, but always came back. It also blows a good bit of blue smoke on first take off after sitting for a while. Sit overnight, crank up, idle out of the driveway and down the street to the main road, pull out on the main road and give it some throttle, and get a big cloud of blue smoke. Goes away by the time I get to third gear. Same thing at lunch time at work, and particularly noticeable after a long period of idling.

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617 swapped Toyota Pickup, 22-24 MPG, 50k miles on swap