there are several in the city. how big of a hurry are you in to get it done? want to do any tuning or just get a base reading?
we have dyno days every now and again, get 3 pulls for about 30 bucks.
B&R performance off sw 89th and i 35 have one. also APS in MWC has one. If they are still called ABLE racing in MWC, just west of douglas i40 has one. all depends on what your are looking for and where you want to go.
if you would rather go to tulsa Archangel Motorsports has one. if you go there tell him Vandy From boldmoves mustang club sent you. he may give you a price break
not sure about one in hennesey, but its a small town, shouldnt be hard to track it down. u just missed a big Diesel shoot out at tulsa race park. there would have been lots of info there