I have the bigger brake cylinders and the soft shoes AND the StageRight Transbrake. I put the brake cylinders and the soft shoes in and found that the car tended to swap ends under hard braking.... I put an adjustable proportioning valve on, but it's a pain to be constantly fooling with it. One setting for the track, another for street. Plus I was still limited to 5-6psi boost.
So I got the transbrake. Made about 20 hard launches (oh yeah, you can launch really really hard) at the track over a year's period of time. Then ate the torque convertor, although I don't know if that was related to the transbrake. Ate another torque convertor, again don't know what the reason was. Hadn't taken it to the track yet, but had made a hard launch or two on the street with the transbrake. Don't know why that would lunch the TC though, you'd think it would be harder on the trans internals themselves... which have held up well.
Keith