I dont know about rare, but they are getting hard to find. Only thing is if it is in a 383, the mains have been cut down to fit the 350 main bearings...that makes the crank useless for a 400. It should be worth $100 if it maganfluxes ok. New aftermarket 383 and 400 cranks are getting cheaper all the time.
Advanced Automotive Machine
1971 Heavy Chevy - original owner
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