Just FYI, Crane had a problem with their adjusters breaking for a stretch. I don't remember the exact manufacturing run, but the adjusters were improperly hardened, making them brittle and prone to fracture. I had an adjuster break, contacted Crane, and discovered my rockers were from the run with hardening issues. I don't remember the exact year, but my situation was similar, I bought a brand new set of rockers on Ebay that was purchased and then not used.
It would be worthwhile to call Crane with the serial numbers to find out if the set you have was effected.
