portioning valve

[dandsgcuda]

Looking to add disc brakes all the way around my 71 cuda and was wondering which portioning valve to use.The car has drum/drum now or do I need the  disc/drum portioning valve .

[Chryco Psycho]

it woul depend on the size of the rear discs proportionate the the front, probably the best solution is to use an adjustable valve in the rear to balance the rear brakes to the front