Hi
When I upgraded my brakes on my Hawk I went on the fact that the weight distribution front to rear is 40/60 just like a F1 car.
This give 55/45 brake forces so I fitted equal size and power brakes. For the balancing I only needed to put in a adjustable limiting valve to the rear.
This setup works very well and tested on the dirt and track, and easy to do on any Stratos.

For and ideal setup the rears need to grab first to reduce weight transfer from the rear, but with equal force which is hard to do.
Ian