Since this will be a long distance purchase there are a couple things I would require before proceeding. I would ask the seller if he would take the block and heads to a local engine machine shop and have them checked and magnafluxed checking for:
cracks in the block or heads
bore diameter and condition of the bores (if it's already been over bored past it's maximum or in need of a sleeve or two say no)
condition of all threaded holes (If it has a stripped hole or two and that is all that's wrong, those can be heli coiled.)
and condition of the block deck surface (because you are trying to save the original stamping, if they say it must be decked this is way too much money)
Then have the shop issue a certificate stating the results. Taking a chance on these parts being good and then opening up the crate on your side and finding problems is not worth taking a chance on. If the seller refuses to do this then I'd pass on this one and keep looking. For this much money he should be able to accommodate your needs since you are so far away and also Tom is 4 hours away and can't easily see it in person. Most dealers in the business of selling restoration blocks will supply a magnaflux certificate with the purchase. I wouldn't buy one I couldn't see first hand without one. You could offer to pay for the inspection if it passes. You will need to do these things before you rebuild it anyway so you will just be one up on the situation. But pay only if it passes.
If all works out you will need to make separate arrangements with Tom to pick up the block and get it shipped. Maybe there is another member or friend in the area that can also assist. I have no idea what it would cost to ship an engine over there.
Tom