Using a disc brake master cylinder in a drume brake car.

RichieDart said
Is there a problem with using a disc/drum brake MC in an all drum brake car? Specifically a '72 Scamp with 9 in drums all around. I have a few A body disc brake MC's sitting on my shelf. Some one told me that brakes will work better this way. All other components (lines, hoses,wheel cyl.) are stock & in good working order.

I am running a disc brake master cylinder with a proportioning valve , and drum brakes on my 68 Dart no problems . 9' drums front , Dodge Van drums on a Moser narrowed 8.75 rear. Going to upgrade to the later spindle and A-arm and 11' disc soon.