I don't know Ft Smith well, but if you can get it to Tulsa I'd recommend Rennsport Werkstatt. I do all my own work now, but a few years ago had them do an IMS bearing and some other work and trust them to do well.
For my VW Touareg TDI I've used the Crain dealership in Fayetteville and I'd trust them to do good work on a 986.
Either one won't be cheap, but will do it right.