A friend of mine offered to build me a turbo kit for quite a reasonable price. He says it will add about 120 horse to the car. He did one on a 5.7l and it kept up with supercharged mustang. The issue that I am having is that my Denali 6.0l is my daily driver and I am concerned about reliability and safety. SO my question is has anyone done a power adder kit and what was the out come?