So according to the dealership they are worried the timing chain could stretch or break and ruin the engine if I drive it. The truck is barely out of warranty and Ford would not cover a new engine if that happened. Even though the ford corp lady is going to offer me an extended warranty for free once the truck is actually repaired. The truck would sometimes act like it wanted to die at idle and the turbo would surge at high throttle. Think the engine codes were P0018 and P0021 all related to cam phasers according to the dealership and an independent mechanic friend.
Like I said, I didn't know your situation. That being said, it sounds like you have more than a phaser issue going on. The TSB to replace phasers is solely for a noise on startup. It won't cause the other issues youre referring to. The dying at idle is likely caused by the VCT solenoids (Not the VCT gears that are being replaced under a TSB). Don't take that as a diagnosis on my part, there are some things a tech needs to do to confirm if thats the case and they do need to be paid for their time to do so.
The chain, I don't know. Maybe yours is stretched? The technician needs to remove the front cover and count the number of teeth exposed on the timing chain tensioner to confirm. Turbo surging? I don't know as that's not a very common issue. I don't know how you are identifying that the turbo is surging but again, that wouldn't be something I would ever try to diagnose from my computer.
All in all, your situation is different than most who have phaser issues. I'd say 80-90% of the time its replace phasers for a rattle noise on startup per the TSB and move on. No chains get replaced or anything other than required one time use parts (like the valve cover gaskets you are waiting on).
-Joe