I got a 1990 Ford Mustang 5.0 I just bought it here is some stuff that was done to it.NEW 5.0L CRATE ENGINE W/ GT40 HEADS AND VALVE TRAIN.NEW NEW WORLD T-5 TRANS AND SHORT THROW SHIFTER. NEW 3.73 GEARS. NEW HIGH PERFORMANCE FORD MOTORSPORT CLUTCH. COBRA INTAKE AND 70MM THROTTLE BODY. COLD AIR INTAKE & UNDERDRIVE PULLEY'S. SHORTY HEADERS, X-PIPE & FLOW MASTER MUFFLERS. Ok the guy I got it from said the Harmonic Balancer was bad, when you have it out of gear at an idle and give it gas you can hear a noise when it's in gear and driving it's kinda like a something bent like a wash machine off balanced not real bad though. Well I checked the Harmonic Balancer and the rubber was pushing out so the ford dealer ordered a new and installed it. Still doing the same thing. Someone Help Please