All trash has probably gone I to the filter at this point. If the cam bearings arent destroyed...you could just re bearing it, polish the crank and run it...save the under sizing for the next rebuild.
you only have so many rebuilds on an engine block and so when it goes down like this it's really disheartening cuz if you cant fix what you got... you have to use up a life , so to speak ...and go the next undersize and over bore...and spend 800.00 for pistons, rings, bearings, gaskets...oil pump.
Do not use that same oil pump again.
You can inspect it, but I'm sure the impeller cog is scored.
