Sorry X'ed, I'm having a bad day at work. Anyway, I just found two AWD Dyno shops in Chicago from another forum. I will try to contact them this weekend. Here they are if anyone is interested:

There are two AWD dynos here in Chicago. One is a Mustang Roller Dyno at Dynatech:

DynaTech is located at
7511 W. Cermak Rd.
North Riverside, IL 60546
(708) 442-8951

The other is a hub mounted Dynapack at GRD:

Genesis Racing and Development
1032 E. Ogden Ave
Naperville, IL 60563
630.369.2800
www.grdperformance.com