I realize this FSB balance issues have been asked and answered here before but I have an additional couple questions.
I recently bought a vehicle which has a '86 5.0L Mustang engine which vibrated when it ran. I noticed the ring on the harmonic damper was cocked and thinking that was the problem, I bought a new 50 oz. damper to replace it with. When I pulled the bad damper off, I noticed it was a 28 oz model - no wonder the engine vibrated!
In checking with the guy who put together this engine he admitted to putting on a 1965 damper - a '65 flywheel too! I checked the flywheel he put on and its an old 160-tooth model. (slap - slap!)
Now for my question - I now have a good damper on the engine now but as for the flywheel, should it be a neutral balance or a 50 oz. imbalance? The engine runs pretty vibration free now, so I'm guessing that I need a neutral balance 'wheel. Is that correct? Does the '65
160-tooth flywheel have neutral balance? Do I need to get that old flywheel off of there or should it be OK?Thanks!