Just got home from Topeka, when I first saw this thread when we were driving back I thought, wow that would be a lot of fun, racers putting up their own prize money is something different.
I'm the first to tell you I know swat about modded turbos to meet some maximum allowable size. It you truly want this to be for the common Joe then made it a 66 stock turbo period and don't allow all the modded ones. It's no tougher on the guys who are running the larger singles who want to mod them than it is on guys like us who are running twins and who have to go to a whole new single set up if we want to race. Set it a true 2.6 no mods and that way no *****ing, is going to be the same expense for everyone and takes who can build the best modded turbo out of it. Put it on the tuner, suspension setup and driver. It would be more of what was originally intended of what was written on the first page still is the goal.
If the modded allowed turbos are allowed then it who can build the best modded 2.6 turbo to make way more boost then a stock 66mm could make. Is that what you want?
Another question does it have to be 6000 lbs or more is there a +/- 1% rule like NHRA and NHRDA has? Your 6000 lbs might be 60 lbs more or less on another scale.
