How much would you pay for this 340?

Get some numbers off the block and heads. Because it's blue, it could be a 72 or 3 with low compression, cast crank, small cam, and small valve heads. . Heck, it could be a 318 and without looking close, you wouldn't know. It's a core.
Yes, the 340s began life painted red. They began switching over to blue late 1970. My April 1971 340 came blue.