Well from what I hear the 7th does make the engine run rich. If you are concerned about that the first thing I would suggest is getting the AIC from URD so you can tune it up the right way. From there I would consider an upgrade on the fuel pump. If you still want to increase the power then I would look into the 2.2" pulley, but only if you also include the water injection. With higher boost you will get higher EGTs so you have to control them with the WI. If you have not done so already read gadgets site and then you will understand why he has such good products for our truck. He went through the research of all this so no need to reinvent the wheel.