We're looking for a number that is engraved or stamped into the cam. Numbers cast into the cam core don't tell us anything. A corporate logo would be nice, but too easy (i.e. FoMoCo). Normally the number is engraved into the front or butt ends of the cam.
I ran 89570 through several manufacturer web site searches and came up empty handed.
Used flat tappet cams should not be re-used in another block other than the one it was originally installed in. I'm assuming you're going to purchase a new block, so you'll need a new cam & lifters.
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