Help with brakes.

As I stated in my original post, the PO bought and installed a booster and MC for a mustang. Summit racing's website says plainly that this setup will not fit a 1970 Dodge Dart.
Well yes and no. I'm big into restomods, etc.. If the bolts line up and everything functions properly as a system then it really doesn't matter what it came off. It usually requires adding parts like residual pressure valves, adjustable proportion valves, etc., that was all I was trying to say.
I get it that you want the correct parts and I would be upset as you are for the same reasons. I can't believe they would sell it like that.