In Chicagoland area for Coyote specific shops there arent a ton. Everytime Ive had work done by a shop, Ive brought my car to Dmark and hes always done a great job. Had him do my clutch, halfshafts, and Fore fuel system this past winter. I use PBD for tuning and thats all done through email obviously and Rob from PBD has been awesome to deal with.
But other shops Id trust are AJ Performance, DynotuneMP, and there is a shop called Untamed auto that Ive heard does great work. Actually, I had DynotuneMP do my billet oil pump gears and crank gear a couple years ago. Also great work no issues.