I have run factory steel 350 crankshafts past 700hp and 7500rpm w/o issue in the past, assuming the machine work, clearances, assembley are all correct they can live a long life. It does matter what the application, I wouldnt run one in a manual trans drag car or heavy car w/ a trans brake. But for a street killer or roundy round engine you cant go wrong if your on a budget.......... |