I haven't been here, but I heard it was good.
I am not sure if he does more than engine
balancing or not:
100 Lowell Blvd
Take Federal South from US36, I70, or Northbound Speer from I25. Turn
right (West) onto First. Take First to Lowell. Doug's Balancing faces
First at the intersection of First and Lowell. Open until 5:30 daily.