Boost Creep: Thanks! It was a thrill ride and amazing for such a stock vehicle other than power increases. I don't have high confidence that shifting into 6th would increase the speed...putting the rpm too low for to accelerate. I think the car is nearly optimally geared. If one were to install a larger aftermarket blower as my tuner suggested - the high air temps I experienced would very likely be minimized...gaining a few more mph not too mention the increased boost possible.
Jannetty: Thanks! Tuning was key to keeping the 416 alive for a ~35 second WOT run...especially with the marginal low side fuel pressure and seemingly need for better than 98 European Octane fuel.
A link to the video: