That was indeed me.

The flywheel and pressure plate are balanced as a unit to itself only - like a car tire. It is not balanced in relation to other components. This is because a balanced flywheel will have a net affect of zero to the engine, in terms of out-of-phase inertial forces. In other words, if the the flywheel/PP is balanced until itself, then all is well and you can feel free to bolt it to any engine.

Just make very sure the mating surfaces of the flange and flywheel hub are clean and dry. Also bolt it to the crankshaft with an opposed/star pattern, like you are supposed to do with a wheel. These things will help ensure that the flywheel's plane of rotation is exactly perpendicular to the crankshafts axis of rotation.

The reciprocating parts like the pistons and crankshaft are balanced separately and I believe that is done statically but I have never seen that done. All my work is done by Golden Shamrock Machine shop in Winston-Salem, NC. However, any full service autmotice machine shop could do this for you.

NCDiesel