I have a 1966 Ford F100 that is going to serve as my project and main transportation. Before I do any thing to it, I want to upgrade the front suspension, and upgrade the brakes. It has a single resevoir Master Cylinder that I want to convert to a powered dual master cylinder setup. eventually I would like to go the whole disc conversion for the front but at the moment money is an issue. my question, should I install a proportioning valve now or wait untill I get to the point of converting the front drums? If I install a proportioning valve initially should it be regulated 50/50 as long as I remain using the stock drum brakes all around?