Robert at Roberts Complete Auto has discovered the engine still has the same clunking noise from the lower end. He is stepping up and provided us with a loaner vehicle while he tries to diagnose the problem. Being familiar with Engines myself, this is a strange problem knowing what has already been replaced or rebuilt. Regardless of the issues we have had with Robert he is an excellent and qualified mechanic. He has stated that he would purchase a new rebuilt engine if necessary. We hope to have this resolved soon.