The one we are talking about? Squat until you fix it. In fact, I would insult you so I am not your buyer. As for a running 340 with X heads, it all comes down to what a buyer will pay. I walked away from a rebuilt steel crank 340 an hour from my house last year for $1500.00 because of the sellers knowledge but was told it runs great from someone who knows the buyer of it. The flip side is someone might tell you 2k for a block. All over the place. Decide if you want to sell it and make a decision.