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chevy motors have a number sequence on the back of the block where the bell housing bolts up.you can take this number and decode it at certain auto parts stores or in a manual. * also look on the front of the engine in front of the pass. side cylinder head.there is a stamping pad that has numbers stamped into them. these will help narrow the year and application down. it is also possible that the casting numbers mentioned on the back of the engine to have been used on a few different engines ie..307,305,350,etc...if there are no numbers on the pad in the front of the engine then that means the block has been remanufactured at one of the large engine rebuilders.they remove or grind these numbers off for some dumb reason.

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19y ago

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