Yes. The V8SHO.com email group is still active. Might be difficult to get Old Uncle Larry to respond and actually sign you up, but we are still there.
a 75 hp nitrous shot is all the stock tranny will take. Any more and you will need a tow truck.
I, errr, put a 'bit' of load on one of our critters a while back -
http://www.v8sho.com/SHO/SHO R.T.S..htm
and the stock tranny grenaded in 160 miles. I had a spare, heavily modified tranny on a bench anticipating just such and event.
Don't just fix your tranny, build the bejeezus out of it.