If your truck read the repair manual, that finding would mean that it is not the pistons/rings that are at fault but the intake or exhaust valves. Matches your impression that the valve train was stuck.I tried squirting oil into the low compression cylinders for retest, but difference was negligible.
You can roll the dice and hope that it is only surface contamination on the valve, causing it to not fully seal. You can further hope that it clears itself up over time after it starts running. Otherwise it's pretty much pull-the-head-time and polish/re-seat the valves.
I'd probably clean up the valve train as well as I could and then run it and see what it does. You can still pull the head anytime later.