Go back to your dealer and tell them the alignment was not properly performed. You know that because eccentrics were not installed in the front of your truck. Follow that with a "ill call consumer affairs if this is not addressed" and you will have a proper alignment performed.
Doubt it. I would say it is fine. The tech probably installed the new relay and shipped it. I had one last week that was towed in. Replaced relay and it was hard to start. After a few good cycles it was fine.
Pics? I agree completely. That garbage needs tone removed. Could be the cause of your spark knock. Now I have worked on a couple 4.0's with heavy carbon deposits causing spark knock from 87 octane. Does it completely disappear with 93 octane? If so you may want to try a chemical de-carbon
If it's the heater core you can drain the coolant and vacuum fill it. I can't speak for all the techs out there but this is the ONLY method I use. It's the only guarantee that 100% of the air in the system is purged
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