I have a 92 bronco 302 e4od. I've changed the front calipers and hoses. Then I changed the rear wheel cylinder. Both front and back brake set ups are factory. I changed the vacuum booster out to a 1 ton because the factory wouldn't pull any vacuum when I tested it. The brakes work better but the pedal still travels to the floor. I bleeded the brakes again. Fluid was slow to come out on the r/h rear. The l/h rear and came out about normal. The front r/h was a little slow but better then the back r/h. The abs on the frame was just as slow as the back r/h. The front l/h came out fast. The brakes work but something doesn't seem right. When I hit the brake pedal it travels about a half inch before I notice it starts slowing it down. The pedal get stiff some but it just keeps traveling to the floor when the brake is applied. When I mash it to the floor at about 55 it stops but no tire lock up or anything. I was just hoping someone with some experience with the brake system could point me in a direction to check or how to fix it. Thank you for any help you can provide.