I do not know what's up your way exactly but the shop that "I" am aware of within reasonable driving distance is a place called Euro-Tech in Machesney Park Illinois.
Of course, there mey be something closer to you but if there's not, give em a call and see what they can do for ya.
9910 North Alpine Road, Machesney Park, IL 61115
(815) 654-4191
This is the only dyno I found in WI. If it's near you give em a jingle and see if they do tuning.
Borchardt Speed & Automotive
6101 South 27th St.
Greenfield, WI 414-282-2390