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I've always heard that Cloyes is the best but can someone please explain how this Cloyes 9-3603X9 can not cause some inbalance problems in a running engine with all that weight removed from one side of the cam gear?
Those holes are drilled to offset the weight of the fuel pump eccentric, even without one if those the imbalance isn't a big deal since the cam sprocket doesn't weigh much overall and only turns at half engine speed. It's not like a harmonic damper that weighs 15 pounds and spins on the crankshaft.