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As mentioned above, if you're looking for a numbers matching restoration this could be worth a lot of money; however, as a builder it's a great block. a 454, 4 bolt bare block with this casting number for sale on ebay for $2500 - 1969 Big Block Chevy L88 427 LS6 454 4 Bolt Main Block 3963512 512 B 1 8 | eBay

As you already know, yours is a 335 horsepower 427 (evidenced by the "LE") that was originally installed in a 1969 vehicle with an automatic transmission. As such it could be worth a lot for someone looking for correct 1969 SS427 engine for a Chevelle or Impala.

Let us know what you've got planned for this engine and we can be more specific in recommendations.

Glenn