I believe the same cam gear that fits a Chevy six will work. The cam gear that fits a Mercruiser 4 cylinder is also a close match to the Chevy- - - -it might need a little machining in the hub area to match up with the thrust plate correctly. New Mercruiser gears are dirt cheap on Ebay.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!