That's a cylinder head casting number, not a block number. Post the number stamped behind the distributor, and/or the casting number on the block near the fuel pump. The head number isn't very helpful since they will interchange on several sizes of engines.
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!