One thing you need to keep in mind when talking about the TT engine is that most guys are talking about using it in SSC class combat. In SSC, boring out the carb is not legal, and therefore talking about the power produced with that mod doesn't help. Same with internal mods to porting and whatnot.

Removing the baffle is ok, but i'm not actually sure about boring out the stinger, I think that's an open question.

Are you using TT's in competition? If so, what kind of RPM are you getting with it on the SSC prop and in an SSC legal configuration?