SBC head casting symbol I.D.
There is a 76 corvette down the block from my house that is forsale. The guy that owns it knows nothing about the car or the motor other than its not the original one. I looked at the head casting mark and it was 3 vertical lines, I've never seen this one before. I looked on a few sites that had some really good info on casting symbols but no mention of the one I'm looking for. If any of you guys have seen this or know what its is please let me know. Thanks