The 2300 wouldn't be necessary for the 6.0L. The TVS is a better option than the Radix as it is more efficient, but really, I think you should be seeing better numbers with a few more mods. Your current numbers are a bit on the low side, but like folks said, your tires will eat up a bit of the HP. What kind of dyno are you getting tuned on? I would suggest a load bearing dyno, if you aren't already using one.

 

Man my turbo 5.3 made more than that on 3lbs of boost!