Well Im not sure about that... I got a couple of e-bodys (both cuda and chally) and stock discbreaks with booster has not the brake pedal 18cm from floor... thats an original discs with booster. It is in line with gas pedal.
Same thing with my Cuda and Charger, the pedals are even.
The Challenger on the other hand, having manual brakes, the pedal is waaaaay higher than the gas pedal. Annoyingly high to the point I too considered cutting the rod but as Mr Psycho said above, it would affect the switch.......