I'm not typically enamored by 340, myself. I have nothing against them, but I see no reason, other than collectivity to prefer a 340 over a 360, unless, of course, you're building a 340 car or cloning one.
I'm not saying their not desirable by a certain faction, I'm merely pointing out that, to me, 340's have no intrinsic value over another MoPar small block.
Personally, of all the MoPar "A" blocks I prefer the 273 HiPo. Of the "B" blocks I'd go for the 383, of the "RB's" I like the 440, and of the Hemis, I like the 392.
I realize that some of these are the top performers in their designated classes, but for me, this issue is my preference. I'm sure many of you will disagree, and have your own favorites, and that's how it should be.
I hope you get your asking price on that 340, Superbee.