I put one on a 08 D7 w/163 and the install went pretty smooth. I definately think that by doing it youself you will have a better understanding of what you will be working with. We went with the Boondocker kit for a few reasons: time to get the kit, reduced cost of repair, reduced down time if turbo goes down, and support. In the process of tuning and building the turbo, you will have a pile of questions you want answered quickly and Jerrod @ boondocker was always there to help us.
I think that I would try it on the 155 track and see what you think. You will have to make some suspension adjustments. Boondocker claims 220-280 hp with their kit with boost from 10psi-16psi.
Fuel gets a little pricey and word on the street is that BD is coming with a 6psi kit that will run on pump gas with no intercooler, also cheaper. Might be something to look at.