91lx 306 has 5 lug conversion with rear disks. Unsure of exact brakes on it. Has an aftermarket MC (2 lines) unsure on which MC it has. Brake pedal is really hard without much stopping power. What should I check next? See if the factory PV is gutted?
You need to provide more information- rear brakes, MC, do you have a proportioning valve, is the E brake set properly. SS or rubber brake lines, Is there air in the lines.