440 Engine Knock

Who was your engine builder (self refection, not really a question). Did he blueprint it? 800 miles? Give him a call and chew things over with him (play nice). If you chewed a bearing. You have metal everywhere. Only the really hardcore would just throw another set of bearing at it. Us anal retentive types are in for a full tear down, clean clean clean. New oil pump, bearings, and gaskets at a minimum.