I read somewhere (don't remember where ) that the W-body uses a different harmonic balancer, does anybody know if it'* true and what are the differences?

edit: forgot to mention I'm talking about 3800 SC serie II vin 1

I would think that they are the same. I would guess GM kept all the internal engine componets the same for all the 3800'* to reduce costs. :?

The harmonic balancer is set around the balance (or lack thereof in ours) of the engine. Since it'* the same engine, you're gonna have the same balancer. Everypart until you get to the mounts/exhaust manifolds they're all exactly the same on same year engines/types.