Stock single master cylinder, or, upgraded dual? Either way, do as 67dart273 posted.....take the brake line loose at the master cylinder for the front brakes to see if the wheel cylinder pistons allow the shoes to return to their post. An easy way to test this is to have your car on a slight slope where the brakes are hot and tight and the car won't roll on it's own. Place a wheel chock a few inches from a wheel and release the e-brake and have the car in neutral. Crack the brake line loose at the master cylinder. If the car now rolls toward the wheel chock, the master cylinder is holding pressure. If the car still doesn't move, there's restriction somewhere else further downstream in the lines.