i just returned from a deployment and i went to drive my mustang today for the first time. things were going well until about a half hour into my drive. i was going to stop and was caught by surprise when i pushed in my brake pedal and had nothing. the brake pedal had no pressure at all, i had no front brakes. when i got home smoke my coming from under my hood. i took a look and on the brake master cylinder (where you put the brake fluid in) fluid was over flowing out of the tank with the cap on leaking down causing the smoke. does anyone know what could be causing me to have no brakes? i just installed a built engine just before i deployed and did not have this problem. does it sound like my master cylinder is bad? the cars body has 84,XXX miles. any help will be greatly appreciated. thank you.