Hello everyone. My name is Brad and I just bought a 2000 Silverado rcsb 5.3/4l60e about 2 months ago. It was all stock except for the Flowmaster exhaust. I first added 22x10/20x8 Boyd Blaster rims for a little attitude and just put a Procharger on about 3wks ago. I have Dynatech lt with high flow cats on the way. I am hoping I can get some good ideas and info to get the most out of this 5.3 . I WAS planning on leaving the powertrain stock but there is a guy at work with a Trailblazer SS with the ls2 that just wont keep his mouth shut. The Trailblazer is a stock SS (395HP) and I am hoping to hurt his feelings when it is all said and done. Can it be done with my 5.3 and Procharger? I am new to the fuel injection and supercharged scene so any help will be appreciated. I have read a few threads on here and most of them point to Nelson Racing. Are they the best for tuning?