There's all this talk about different kinds of valves to be added , having to replumb the brake lines and everything else. All I really want to do is make my old '51 safer to drive. Is all this nesessary? The parts catalogues give the impression that all you have to do is add the dual MC to the existing brake system and all is fine. They seem to say it fits like a glove. Is this true? Can I buy the mounting bracket and the dual mc and install it without too much pain and have a safer driver??? Thanks