Any and all Type-O castings are cool but this block even appears usable if true about no filler in the passages...it doesn't say if a Can-Am displacement or other though, does it?.
Most interesting is the Copo 9567 comment in the questions from someone who's spotted the 9567 clone in the background...wonder what the real story is there?

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And haven't we come across this seller before w/ that same 9567 clone and stories of how he had some GM exec retired uncle and a hidden warehouse of prototypes including one of the real 9567 cars etc?.

~ Pete