The closest top firm for an IT motor is King in Wisc, as others have suggested. If you talk to Scott, tell him Jake (G, from CT) sent you. Scott used to run AT Engineering here in CT way back when before he joined King, and then became the owner. They also did the Mosers recent prod car. As with any of the top shops, don't go in with an empty wallet. A "to the max" motor will set you back. King is a Mugen dealer and a Honda specialist.

Blake Merideth and Matt Kessler are also well respected, although much further away. Matt does mostly Miatas, and some Hondas. I'm not sure what Blakes coverage is. he's been in the game for quite awhile and has lots of racing experience. I know he does Honda, Porsche and more.