You might be able to contact Rich Gala of UCS Tuning.
http://www.ucstuning.com/ Former W2W. He can give you advice on who to contact, but on supercharged engine you want a good tuner. My Harrop TVS 2300 LS3 418 uses LS1 ECU and Speartech Harness, but it was tuned with HP tuners software.
The problem that I ran into was finding a person that can use HP tuning software, that had experience tuning a Supercharged engine, so Kurt Urban hooked me up with Rich Gala. Also, you need to find a tuner that is willing to travel to your location.
Jeff