Time for today's brake related question...Disc/drum combo
I've done a lot of different brake size changes over the years and have had to change the porportioning valve a few times. But have yet to do what you have done. So I'm realy instrested if someone can give you a definite answer. You may have to drive the car and test it. That's what I did. If one end dose all the braking without much help from the other end your going to have to do something with the valve.