Does anyone know if a srt 3.06 can be put in to an RT ? Can I use all the same axles, will it all match up if I just bolt it in, drive shaft, ect.? Are the srt diff LSD, or open? Or are there other things to consider? Also I was just thinking of switching the rear end I found one for cheap off a srt charger. Do you think it will work? Also with a 3.91 what kinda RPMS you running around 100mph? I am afraid if going to a 3.91 it would be screaming with no more umph? I saw that they make a 3.23 I don't know if that would work? I would like some advise, or any comments would be helpful.