4 wheel dyno in Illinois?

[mopower76]

I would like to get my Grand Cherokee SRT 8 on a dyno and have someone tune it to optimal performance using the Diablo Preditor programmer.
Would anyone have a sugesstion as where to go that would be trustworthy to perform such tuning?
Thanks

[Mike_Levy]

What mods do you have? Unless you have a ton of stuff (like me), you could probably do the tuning on the street and save dyno fees.