Grinding, " diesel " noise under valve covers

Hey Everyone, Hope all is well! So, in light of the **** distributor adding to much timing ( I know it's my fault. Never trust advertising specs. Or anyone else w/ a timing light!) It sounds like a diesel truck under my VCs... horrible loud grinding. Scary stuff... don't know if the moly pushrods ate the heavy duty MP factory style rockers? It's a mp 484 cam ( hyd) thanks, Chuck