I don't know Greg. I had a T76 also and even after swapping to a smaller Q trim exhaust housing, It still took me a solid 5 seconds to build full boost. That meant my reactions times were always about a second or two at least.
That was with a transbrake. I doubt the two step will be much help but wish you luck. If it's an auto, I'd think a bigger stall in the converter is the best bet. if it's a manual, the two step may help some, but it's going to have to be set pretty damn high to load that thing by the third amber.
I'll be watching with interest. Good luck and keep us informed on the progress.