Hey Swampmike - I never took off the harmonic balancer or messed with it in any way - I did not rebuild this engine - it has had head work but not by me ........... I can kill the engine just by turning the distributor in either direction far enough - I simply kept it in the "middle" of those two adjustments and "listened" to how the engine ran - once it smooths out I stopped turning the distributor and tighten it up.