GM 3963532 Harmonic Balancer Damper 454 LS5 LS6 8"
 

Nice Original 8" GM 3963532 Harmonic Balancer Damper in excellent condition with a solid un cracked rubber seal. For the externally balanced LS5 or LS6 454 motors only.
$75 USD plus $15 Shipping.
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Now *SOLD*

Do all mark iv 454s use the same balancer? To my understanding, they do. I’ve never really researched that or can say that is fact? Thanks sYc

I think your right, production line 454's had an externally balanced Damper used IMO not sure about over the counter 454's.

I added a set of bolts for the pulley. (See Photos)
Price lowered to $70 Plus $15 shipping and I am throwing in those pulley bolts.

Original 454 crankshaft dictates. I’m building a 496 for the Monte and the crank I’m using is internally balanced

Now *SOLD* Thank you JOE and sYc

Do these balancers have dates on them? And I've noticed that some balancers with the same casting number have a different amout of what appears to be drilled holes around the outermost face of the balancer. Are these done for balancing purposes? Thanks. Mark

Anybody???

Yes.

K