BB harmonic balancer

[GI JOE]

The machine shop says my harmonic balancer is likely no good because the rubber is rock hard. 

Is there anything I can do or should I just get a new one?

DO they even have correct 8" harmonic balancers anymore from GM?  Any advice is appreciated.  GI Joe

PS also looking for a correct 68-69 BB oil pan.

[bertfam]

DALE MANUFACTURING has a very good reputation, and I have one of his rebuilt balancers on my 69 Corvair. Great job and very reasonable prices.

Ed

[JohnZ]

"Damper Dudes" (800-413-2673) and "Damper Doctor" (530-246-2984), both in Redding, California, rebuild harmonic dampers; lots of the Corvette guys use them - they do excellent work.