If you haven't pulled it yet, you may consider offering the buyer a test drive with it in place. I payed a little extra for the GMC 302 I bought because the seller had it hooked up to a test stand when I picked it up. I got to start it cold and run it. I couldn't drive it because it was out of a wrecked truck but at least I got to fire it.
Yes, that is very much my intent. I know I myself would have loved to have the opportunity to see, hear, and test drive the LS engine that I will buy. That's why I want to try to offer it, and sell it, before we actually pull it out on a weekend.
Jim G