Head Gaskets

No sleeves, .030 bore and o-rings in the deck. The debris on the top right of the deck is just old gasket. I didn't get to disassemble, so I got a pile of parts. Don't know what kind of gaskets were used previously . Do have a X-Block here, that also has the deck o-ringed, and that had .080 thick copper head gaskets. Thanks for the replies.