That above pass I shifted @ 6700 2nd to 3rd. The RPM dropped around 400 and it spent 7 seconds buzzing from 6300 ish to 7000 at the stripe. On the video and in the car it just feels and sounds like the rpm is almost constant for the entire pass.
I have a 9.5" ATi converter that was built for a 950ft/lb 655 that will be going in and it stalled around 5000 with that motor. But if the 655 is completed, I will be using that motor instead. Season is finished over here and we have an upcoming house move so it may be late next year be fore we are out again. My opinion is swaying to the conclusion that I've found the limit of the converter and it's either broken or just no longer up to the job.
I'll likely be buying a converter suitable for spray as we are contemplating putting a fogger kit on the 655 sometime.