I’m open to be corrected on this… My understanding is that Ute M/Cs don’t have a built-in proportioning valve and this allows you to fit a stand-alone proportioning valve. Otherwise if you use an M/C with a valve and also fit a stand-alone valve you will have all sorts of problems.
Utes have a device fitted to the rear which will adjust the brake bias according to the ride height and thus the weight carried. Here is a photo I took of the device on the VZ SS Ute I used as my donor car. The long U-shaped rod is the sensor.
