There is a guy down in Charles town Indiana That builds everything from 750 Honda's for TQ's to Big Block Chevy for the drag race guys. His specialty would have to be Midget Motors. He has a very nice Dyno Room and gets excellent results. His name is AJ Felker, He probably has one of the most complete race shops in Indiana for both Chassis and Engine work. He does almost everything in house.
I would suggest a trip to Charles Town to check out his operation.
BES (BISHOFF) OUT IN ST. LEON ARE OFF i-74. HE WAS MOTOR BUILDER OF THE YEAR FOR A FEW YEARS. OR WILLIAMS IN ST. PAUL. HE IS DOING A LOT OF THE SPRINT AND MOD GUYS IN THE AREA.
Since Williams in St. Paul was brought up, why not Zimmerman Brother's Speed Shop in Greensburg. I know they're not very prevalent in sprint car engine building, but they do a lot of drag and mod engine builds. They've also got a pretty nice in house dyno room.
Gaerte Engines in Rochester, IN. I recommend the chassis dyno they have. Best way to know how much power you are putting to the ground. Give Joe a call.