FWIW, there are tons, I mean tons, of auto cars, with trans brakes, and 2 step. I actually just raced a turbo mustang yesterday, with a trans brake, and 2 step. The trans brake isn't to build power, its to hold the power. You can't expect the front tires/brakes to hold back a bunch of power (I'm talking rwd car), so the trans brake holds the power. The two step is to help set launch rpm and to build boost. Now, in this guys case, he wants 2 step because he thinks it would be cool, and to help set launch rpms. If he stalls to the full stall speed, he spins, if he stalls differently (not sure where) he doesn't spin, but is probably a little bit slower than what he would of been, had he launched petal to the floor already. Is it going to make a world of difference in his car? No probably not, stickier tires would probably help him more than anything else. But that's what he wants.
To the couple of nutsacks that dont think you can put 2step on an auto, you should probably put your helmets back on, and go sit in the corner.
