Just finished reading your whole thread over the last couple of evenings and I can definitely say I really like the build and your fab skills. You really don't mess around. I can say this though, I worked the last 3 years as a service writer at a dodge dealership with a lot of diesel traffic. Get rid of that emission BS. Once you hit 60k miles, you need to clean out the whole egr system which is pretty expensive, but that's not the big issue. If anything goes wrong with that system, it can leave you stranded. One message I saw many times was- Truck will not restart in XXX miles, and it means it.
I know its sketchy modifying a vehicle under warranty, but the first time you drive it and feel the difference in power, throttle response and fuel economy, you will kick yourself for waiting as long as you did. I had a customer who had a small fleet of trucks. Once one of them got out of warranty, the deleted all the egr stuff and put a programmer on it. The next time he came in, he had done the whole fleet regardless of warranty coverage. Those trucks feel restricted for a reason, they are. 95% of the issues we saw with the new trucks was with the emissions systems (dpf, NOx sensors, scr cats, def systems (that filter is like $90 by itself!), egr valves ($700+), etc), and lack of maintenance. I saw one warranty engine job in 3 years with 3-4 diesel techs flagging 60+ hours a week with a 1 week minimum backlog. Those engines are stout, just not all the crap bolted to them.
Just my $.02- keep up the good work.