Got a 1965 Sport Fury with power brakes, 2 3/4" x 11" fronts, 2 1/2" x 11" rears. Just got the car, trying to make it road-safe. Runs fine (383, 4bbl, 3spd) but boy, oh boy, she doesn't wanna stop. I've flushed the brake fluids thru all 4 corners, bled the lines, and replaced front shoes/springs/hardware, all made almost zero difference. After about 10 minutes of driving (very curvy/hilly where I live, on the brakes quite a bit), the brakes totally fade. At a stop, on a downward hill, the car will literally creep forward, scary as hell. Front shoes from RockAuto, I'm sure all Chinese crap. Rears looks fine, left them alone. Not a drum brake guy, I have no idea where to start. Just disc swap and be done with it? Spend time trying to make the factory drums works? Any advice is extremely appreciated.