Your 454 is externally balanced. They all are. Unless somebody has spent big bucks to internally balance the crankshaft. But if it's stock, I doubt it.
You'll be able to tell by looking to see if there is a counterweight cast into the damper (on the front of the crank), or not.
[This message has been edited by SS3964N8 (edited 12-25-2001).]
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