Disc Brake Conversion Failing

Would a car without a proportioning valve run a larger resivor to increase line pressure to the front? Totally Spitballin' here. Just wondering.... but yes, these people MAKE mistakes, and even sell crap that dont work. Knowingly....
yeah I'm definitely not going to find out and I also agree with them selling crap, hell I called the so called manufacturer and they don't even make the part only sell it. It would be the same as Wally World selling brakes with there label and not knowing who actually made the part.:mad: