A real performance cam for the Gen3 Hemi won't have much rump rump . not to say you can't have that because you can..it's just not best power wise.. today's cylinder heads flow so well that the old school idle overlap that all love so much actually kills performance. decide if you want performance or if you want to be a cruise in poser. contact the cam grinder of your choice and be honest in what you're looking for. Green,MMX,Barton,HHP,OST etc etc.