Cummins 12V Got Boinked - Fix it or Swap it?
 

We were making slow progress on the kid's truck until recently. I'd reckon he needs to man up and learn how to weld. Not that I can weld …

https://www.youtube.com/watch?v=3UXiST8ByFo
It does well MPG-wise to-and-from college on the highway (or so the kid tells me) but it's never run on anything but dino diesel. I dream about running a conventional diesel vs Propel DieselHPR (Neste's renewable diesel) test (MPGs, Dyno & Smog). But we're in NJ and Neste only sells their stuff in CA.
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Fix the 12 valve.

I say fix the 12V. I have a few engines I really like. The 6BT, the T444E, and the Toyota A blocks (Half the cars in my garage have a 4A block with the F head) are near the top of that list.