I did to my 2500. I bought the EGR System. I was one of the first and since then, they have made a few improvements.
I also bought the Slotted rotors and Carbon Kevlar Pads. These things are great, They require to be heat treated on a break-in to "Set" them.
The rear conversion is neat, no different Proport. valve messing, comes with a length of hose to go from the stock hose to the caliper. Caliper is from a 77 Olds Toranado. Has a lever for the parking brake which just puts pressure on the pads and rotors. A neat trick is when setting the E-Brake, push hard on the foot brake then set the E-brake. Will hold harder.
Here is a shot of the rear all done.
<img src=https://www.turbodieselregister.com/user_gallery/sizeimage.php?&photoid=2113&width=2/src img>
Here is the Slotted rotor after 5000 miles
<img src=https://www.turbodieselregister.com/user_gallery/sizeimage.php?&photoid=2886&width=2/src img>
The slotted rotor kit new
<img src=https://www.turbodieselregister.com/user_gallery/sizeimage.php?&photoid=2108&width=2/src img>
The performance has been very good, helps with my towing of my TT. has better stopping power.