Well, it will be interesting to say the least as to the outcome of how the converter is going to handle this power and RPM range. Im thinking that you will end up with a 10" deal. Im thinking that the RPM range that your dealing with (sub 7000), in conjunction with the big torque of that engine, that a 8" converter just might not have the holding power. If your engine was a 8000 RPM shifter, I think it might be different. I plan on going to Irwindale as well on Thursday.
Oh by the way, when Ron drove off from my house, he blipped the throttle just a little and the engine blew the tires off and flashed to 6k+ in a matter of a tenth of a second. I would have thought he grabbed a unit when he did that. CRAZY!!