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can someone tell me what year my motor is if i give # the heads also?i know its BB came out of 74 k20 that had 350 on the grill
 

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you can get it close....but not always exactly the year...."i think"

post em up...give it a shot for ya
 

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The best way to find out exact info is to go off the build/serial numbers. I'm not sure of the exact location on the BBs, but its on a flat pad in front of the pass. head on the SBs.

The casting numbers on the rear bell housing mounting area will just give you a general idea of the year model and might also cover a few different engine sizes.
 
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