The problem with the shifter is that it's not actually bolted to the tail shaft of the transmission (this is also true for the GT). While the transmission is subject to torque from the motor, the shifter is not, and it slightly changes the geometry of the shift levers under hard acceleration.
There are two "fixes" for this:
0) Change the motor mounts and transmission mount to urethane parts that allows less flexing under torque.
1) Change the shifter to something more precise.
Of course, you could also upgrade to a Tremec T56, but that's at least 10x the cost of the other two things combined.
Regarding the speed limiter, you need to buy a tuner to turn it off.
I've heard conflicting stories regarding the need for a 1-piece drive shaft, but to be on the safe side, I got one.
Last edited by jsimmonstx; 04-15-2014 at 12:12 PM.