intake switch.

so i changed my 2bbl cast iron intake out with a performer 4 bbl last night and im curious about a couple of things. first off, is the port hole in picture supposed to be all blocked up? and if not how do i unclog it with out getting all the stuff down into the block....matter of fact how do i clean off the surfaces to put new intake gaskets on with out getting gunk down into the engine. also i bought felpro gasket set..any thoughts on the cork ends?(good...bad) and i found some little metal peices underneath the intake, any ideas what thats from?

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