Have this 340 dug out. Standard bore. It will need boring. Stock pistons are junk from hammering them out from being stuck, rods are good crank appears to be fine will need to be cleaned up though. Posting here first to see if it matches for anyone. Bay city Wisconsin
I cleaned up your description. Let's just keep these as "available" and not right out for sale. If this engine is a match for someone they will PM you and make arrangements to buy it. You can start a For Sale thread whenever you wish. Thanks.