I use a place in Lewisville.
Its called Speedworks. They are great bunch of guys. They do not know diesel performance, but can run the dyno with the best of them.
I have used the Redline performance dyno as well. I dont think you want to go there.
If I ever get my truck figured out, maybe we could show up at the same time and dyno together.
I have called all these guys and many do not have the room for the trucks to fit or just flat out dont want to do it.
Don~