Not enough rear disc brake pressure

[455bird]

Yes, the prop valve is turned all the way clockwise or in. Other than changing rear pads, what are my options for the front brake calipers to match up with the rear S10 calipers? Or would I be better off changing the rear calipers? Is a 1" mc too small? What size would you recommend? Does anyone make an aluminum mc with a plastic reservoir similar to what I'm already running? I prefer to stay away from the old style cast iron units.

Thanks for the help!