flywheel imbalance and questions

[big_ford_rednek]

was wondering the difference in flywheel imbalance on a 95 300 6. if my research is correct, there is either 0 imbalance or is internally balanced. can you add to a flywheel or just subtract weight? also, how much does it cost to add or subtract if possible. thanks derrek

[300 Buster]

I would kinda like to know about the balance on the 300s.Is it internal or is it on the harmonic balancer ? I think the flywheel is balanced by itself (not with the engine's internal parts) and should be done with the intended pressure plate mounted and marked for index.Every time I've had a pan off,I've forgot to look at the crank to see if it's drilled for balance.