Big Inch Small Block

Hello. Have you or anyone you know or have heard about, built that huge (476 cu. in.) big-inch small block that is in the back of that book titled "How To Build Big Inch Mopar Small Blocks"? It would be a tremendously great engine to have in an A-body, but the block alone is thousands of dollars bare. I'd love to know how much money it would take to complete it, with as many modestly-priced parts as would be safe or practical to use in building this bad boy, since it would need custom-made pistons and quite possibly a dry sump system. The authors stated that with moderate effort, the engine combo could make 850 hp., no problem. I know that it wouldn't be necessary to have it in your car to have fun, but oooh boy, that sound and fury that engine would produce. I'll most likely just build a high horse 318 and call it a day. Just pipe dreams, I guess. You never know.