Proportioning valve with rear discs brakes.

[Vince M]

I've ordered rear disc brakes and was wondering what is the best proportioning valve and master cylinder to use with them. I was thinking that a four wheel drum brake proportioning valve and master cylinder would work. My thinking is that there is not the huge mismatch in pressure if all four wheels are discs. There obviously needs to be more pressure applied to the front vs the rear but a drum brake system would already have this.
Anyone have any thoughts on this pros or cons.