First of all, thanks for the dyno chart. That's an impressive result. When I calculate your HP, I come up with approx 650 HP given your 618 ft lbs of torque at 5500 rpm. Nonetheless, a quick and relatively flat torque curve is far more important than HP.
I don't want to get a tune because, quite frankly, I own this vehicle; its my daily driver; it has to last (have you seen the price of new/used vehicles??!!) and I don't want to wear the engine with increased pressures, etc. In addition, I just don't trust aftermarket tunes. If you look at the software, i.e., the tables and inputs to produce a result, it is complicated. I used to use Link G4 ECUs to tune, and we only used 12-14 tables, for example fuel delivery rate, fuel correction by IAT temperature, manifold pressure, timing, boost, acceleration rate, cold start, hot start and so on. There are probably well over 50 tables in our ECUs. You just need one corner to be cut, or be too aggressive on timing on boost, and so on. For me, I'm ok with the power delivery using 87 octane or 91 towing. Personal opinion.
Since our ECUs learn, installing a new aftermarket IC needs no tuning package to get the benefits.
Thanks again for the chart.