Starting your thread with "I know a guy" is such a passé way of saying "I'm gonna do this, what do you guys think?" 
You see... I know somebody that knows somebody... who's brother's uncle's cousin....
It makes much more sense to sell the engine (ebay for the best bucks) and if you want something like it, get one from the proceeds... but just not sandcast. The whole sandcast mystique adds some fun to our little hobby... doesn't it?
To a degree, I almost don't care about the sandcast "fakes" if they cannot be easily determined to be fakes. If enough effort is made to make a good fake, it'll have to have a bunch of expensive parts (there are "tells" everywhere). It's similar to the old GMs. Some of them can be "faked" to the point no one could determine otherwise and some cannot (due to VIN vagueries or lack thereof). Any of these doggies with original documentation are worth more and for good reason.
If I were to get another '69 SS Camaro or old big block Chevelle, it would almost certainly be a fake just to keep costs down.
Representing a fake as real (especially when you're trying to sell it) is kind of whole 'nuther kettle a' fish.
