[505stang]

I asked the same question to my engine builder, i built a 351 cleveland to a 408, used scat rotating assembly, i was told to buy a 28 oz imbalanced flywheel, when i asked the builder as to why he said he always has to balance engines even if they say it's balanced, and also it is easier to balance the rotating assembly with the imbalanced flywheel as opposed to adding malory if needed, i quess he knows what he is doing as my motor in my mustang made 830 hp and the one in my cobra made 547hp. chances are you might have to balance your damper also. I hope i explained it right or i am going to look pretty dumb!