Well I bought a 6.7 Turbo today, it should be here in a week or so. I got the turbo, manifold, and stock coolant lines. Now to save for the controller.. I will want to do studs first, so it will probably be some time before the VNT goes on, but it was a good deal.Fleece makes the controller and its pretty sweet. Its fully automatic, and include an exhaust brake function. You can custom tune the program to run the VNT like you want, and to limit max boost. Then there is a cab mounted dial for fine tuning the nozzle if you want, so on hwy trips you can open the vanes up to drop boost/DP and increase mileage, or towing heavy you can tighten the vanes a little for faster spool up. The compressor/turbine are the same size at my HE351CW, 60/60 but the housing is 3-26, so when its dialed in I should be able to have a little lower DP while towing which should lead to slightly lower EGT, but the bottom end while towing should be nice. I can't wait!

i have one of these apart on the workbench right now. they have a very unique way to control the vanes. i'd get a pic, but i'm sure it won't come out, the cool part is inside the bearing housing where it's all dark.

figured i'd rebuild the turbo before i used it.

what downpipe were you planning on using? you have a third gen, so either the 6.7 or hx40 would work for you. i'm leaning toward a 6.7 full 4" after i crawled under a truck at the dealer yesterday. i had been wanting a 6.7 full 5", but that would probably mean modifing my 5" exhuast a little bit, but the 4" looks like it will slide right in place.

Any 3rd gen downpipe will work, 5.9 or 6.7, so my stock one would bolt up to the OE 6.7 elbow. I am not sure a HX40 would clamp on without mod.