Front Brakes Hardly Working

If after you fix the front brake problem and you find the rears continue to lockup you might try smaller (7/8") slave cylinders and arc the shoes at the ends. Mine were grabbing hard, I did both of these mods and they no longer lockup or send the car sideways. I also used EBC "green stuff" pads for the front Kelsey-Hayes setup, they now grab properly and made a huge difference!