When I had my 7.3, I had my turbo rebuilt and added the Wicked Wheel. I already had the ATS housing so they just rebuilt it with the added housing. The rebuildwith all new bushings etc cost me around $300. So the cost of the ATS is around $400 and the WW is $60. Most do not change out the wheel and leave it stock, the choice is up to you. If you install the ATS housing you will have no more surge. The WW will not gain you anything but a wicked whistle. I loved mine with the WW as I sounded like a 747 going down the road, but it didn't do anything for surge or power as the ATS housing will fix the surge issue by itself. Make sure the rebuild outfit is going to "cook" the old turbo to get out (burn) all of the old crud.