Value of a 340
They are rare, but in my opinion not that difficult to find. My husband's Challenger came with one (free)...my early casting '67 340 complete and running was bought off ebay just a few years ago for $600, and in January we bought a standard bore '71 block for $150 off Craigslist.
And though we do have 360's and 318's and even a lone big block, none of them give me the warm and fuzzy of a 340. lol...