Always check the Suffix and/or casting #'s as it's the big trucks that got the tall-deck blocks and the light duty trucks etc had the short-deck BB Passenger car engines..
Through to the 80's GM Pickups, 1-Tons, Suburbans also Motorhomes too are great places to find the short-deck Passenger car Chevy BB's!.
If you find one don't forget to bring up the truck blocks are worth less story.
~ Pete
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I like real cars best...especially the REAL real ones!