ORIGINAL: novawagonmaster
I have software from HP Tuners for tuning GM cars (and it easily takes care of the issues you mentioned). HP Tuners is working on the code to be able to tune/reflash Mopar ECUs. They say they are getting pretty close to releasing the Mopar version. HP Tuners is a complex program that requires the use of a laptop to tune the car. This is professional stuff...not for your average weekend warrior!
It would make it worth it to ensure the transmission shifts at redline... the engine makes peak power at 6,400 RPM and the friggin thing upshifts at 6,000[:@]