Installed the Parking Brake System today. I'm using the AirWard Parking Brake Kit. The kit uses the Matco PVPV-D Valve, which is two valves ganged together and mounted to the firewall with an adapter. It's a very well manufactured kit but the illustrations on installation instructions are pretty much useless. You start by installing two nutplates in the adapter plate. Then attach an arm to the bottom of the Adapter Plate. The nyloc nuts were 13/64. Very small. I then attached the two AN816-4D straight nipples and the two AN822-4D 90 degree nipples to the valves. The kit supplied the Loctite 567 thread sealant which is applied to the NPT side of the nipple. The instructions have you remove the Van's Brake Bracket and install the Adapter in its place. The holes from the Brake Bracket line up perfectly to the Adapter Plate. The counter sunk holes on the back of the Adapter are aligned to allow the part to nest in the dimples on the cabin side of the firewall. There are two screws that are in the center of the Adapter you set from the engine side of the firewall and seal with Loctite. Then six 426AD3-4 flush rivets. They give you the option of using CCC-32 cherry rivets if access is an issue, but the standard rivets worked fine. I decided to put some labels on the valve for future reference. An arrow for flow direction, Right and Left valve, and even the size of the 3/32 Allen Set Screw used for the Cable Nut. It's a nice kit and easy to install. I may send AirWard some of my pictures so they can update their instructions.