help, does any one know the balance specs and sizes for 96,3.8l mustang flywheel and harmonic balancer and the 97,3.8l,automatic flex plate and harmonic balancer? witch are they both 28, 50, etc.. I have a car that is a 96 3.8l manual trans t5. this car has an 97,3.8l automatic motor placed in the manual. I need to figure out what the sizes are between the two are because my car has the flywheel from 96 manual mounted to the 97 automatic motor and the 97 motor has all the top end and bottom end parts on the block from the 96 manual. I bought the car this way, it shock the whole car ever since the other person put this motor on it, did not shake before person placed this 97 motor in it, I believe that the balance is off and cant find out what the balance would be for each car on each end flywheel and harmonic balancer and fly wheel and harmonic balancer from both of the vehicle's . I need this to fix my car in order to take the flywheel off it and either buy or have machined it to the specs of the automatic motor balance. so what is the balances of 96,3.8l manual flywheel and harmonic balancer and sizes of clutch to it. and sizes and balances of the automatic flex plate and harmonic balancer so I can correct the fly wheel on this car?