This one is an odd ball. I have a 73’ 340 block that is std bore (4.040) but it came out of a boat. There are no stampings on the oil pan rail. And on the front of the block is stamped 340 CCW. It was NOT raw water cooled. The boat has heat exchangers. So its in rather good shape. It will need one sleeve ( see pics) i believe it sat with water in one cylinder for a long time. Id like to get $400 obo. Located in Southeast FL.