@IDIBRONCO in theory yea I read all your diagnostics and saw you say it dragged a bit and spun faster cabled to your truck so it didn't sound thst slow.
It depends on the type of starter. If it was a Mitsubishi, then no it wasn't that bad. If it was a Nippendenso, then it was bad. I looked at it and thought that it's a Mitsubishi starter, but can't remember for sure. I'm doubting myself at this point. While glow plugs do cost more than a compression tester, they are almost needed to drive the truck while a compression tester isn't. Of course if the engine doesn't at least attempt to fire after using the block heater, then a compression tester would be a good investment.
Since the truck's been sitting for a couple of years (maybe longer) the compression will probably read lower than it would after being run and completely warmed up. If the readings seem low, don't immediately assume that it's bad.