A just wanted to tell you guys that my stang is back up and running. I had a vibration. I was told to check the harmonic balancer. I told the mechanic that was working on the car (paint, lowering, fix AC, racing stripes, etc.) He told me it was good so I looked for the problem in the clutch tranny area. I did find that 2 tabs that hold the tranny to the bellhousing had broke so i thought i fixed it, started it up, still vibrated. So I checked the harmonic balancer, and that was the problem. Should have listened in the first place, anyway, thanks guys