Thanks for all the input guys, hopefully this thread provides more insight to others in a similar situation.
The dealership were very helpful for there part, it was the chrysler canada side of it that was the issue.
They got it in and done pretty much the next day after dropping off the receipts/info needed so can't complain there.
Thank you for taking us on your journey of getting your Hemi 5.7 fixed and in good working order. You are fortunate to have dealt with a good dealership. The service advisors at my local RAM/Dodge/Jeep/Chrysler dealership have each a sign on their forehead that lights up and blinks intermittently in red every time someone shows up with potential lifter issues or even a ticking engine, saying: "Go Away! ... Go Away! ... Go Away!"
Humor aside, I am genuinely happy for you. What happened to you makes me a believer once again in my original theory and what I have been told by two engine builders that are local to me, that sometimes Chrysler installed poorly built lifters in new engines. Of course, they will never own up to it and instead point the finger at their suppliers.
In closing, I'd like to say that while I run Red Line 5W-30 as a precaution trying to keep my Hemi humming along for as long as possible and that I have a supply for the next two years in my stash, there is a gentleman on this forum who put over 300K miles on 5.7 Hemi running nothing but Mobil 1 Extended Performance 5W-20 with 15K OCIs. Here is the thread:
https://www.ramforum.com/threads/2014-ram-rc-swb-1500-4x4-rebuild.170447/post-2542397
Here is a UOA from a 5.7 Hemi with over 120K miles on the clock. This Hemi was never well taken care of, and this UOA is an extended OCI of 15K miles on Mobil 1 EP 5W-20:
https://tinyurl.com/long-live-hemi. I found it particularly humorous when the person who did the truck's maintenance said that his father-in-law used "bar and chain" oil for top-off. To make a joke, I guess that's the "magic oil" needed to avoid lifter issues, not expensive additives and engine oils.
Your story, combined with the above thread, and the UOA I linked, gives credence to the theory that Chrysler has quality control related issues on their supplier's side when it comes to lifters, possibly even cams, but lifters most likely, and that these issues are still alive, and well. Some owners who run minimum spec oil and don't take outstanding care of their trucks enjoy them well beyond 100K, even 200K miles, while those of us who over maintain them and spend copious amounts of money on oil and filters run into lifter issues. I guess Murphy's law is alive and well, and that's how life goes sometimes.