in which case the solution is to remove the prop valve, find the nearest trash can, and plumb the front outlet of the MC to a tee and to the front wheels, and the rear through a reduction "proportioning" valve as you always see, then to a Tee to the rears.

if you need to have a reduction in front force, throw a prop valve inline for it, too. usually the rear is what is in the car accessible to the driver. the front can be kept underhood for adjustments if needed. I say use all the brake you have available and make the tires cope with it. get off of hawk blues and onto one of the newer, better modulating compounds like the DTC line, or a carbotech XP10 or XP12 maybe.