I did the turbo first because that will determine what the exhaust connection will be.
I did a remote brake.
I wanted the pressure buffer of the pipe for the turbine, as well as for the brake,
Get the brake away from the turbo temps,
I have an air operated brake. My air supply is in the bed of the truck, so a "remote" brake back before the muffler works well for me. I went air because the electric solonoid type down by the road salt and water just did not seem real smart.
I am really happy with the US Gear D-Celerator and the DTT transmission (w/smart controller) combination.
Bob Weis