Tandem booster/cylinder

[stpackard]

I had a donor camper special 2wd disc brake/drum brake tandem style booster/master cylinder rebuilt. It’s for front/rear drums on a F250 4x4. There were no power breaks on the parent highboy.
Will it work with drum breaks in front and back when I believe it was intended for disc up front and drums in back? I wasn’t sure in it will be over powered.
Thanks,
Sam