We purchased this resurrection project knowing it had been sitting since 1996, and the sit time was not too friendly to our Z.  Besides being rusty in the pulley grooves, I am a bit concerned about the rubber binding material on the balancer.  The ones I have found do not look like the original and the diameter specs listed do not match mine.  There are a few specialists rebuiding the balancers with new bonding processes.  Any suggestions from the Z experts will be greatly appreciated.  Based on the number of harmonic balancers we sell at our parts store for much newer vehicles, my previous belief of them being a part that never goes bad, has been erased.  Being over 40 years old and  over 20 years of bad storage has made me a bit uneasy with this balancer/crankshaft pulley.  Thanks again, John-Lugoff, SC-praying for minimal damage from Hurricane Dorian.  We are far enough inland to avoid the strongest damage but concerned about others near the coast.

I've used Damper Doctor to rebuilt a couple of HB's, very happy with the result.

I have seen their ad in Hemmings Motor News.  The Damper Doctor has a nice looking website and very good reviews.  Nice to know of another Datsun guy having good results as well.  Depending on our weather situation tomorrow I may try to contact them by phone and get the correct process for sending mine out there and checking about the rusty grooves.  They may want them cleaned before sending it to them.  Thanks for the info, John-Lugoff, SC.