I used a 440source rotating assembly in my Daytona ans had over 275 passes on it with the quickest being a 8.60@151 mph. I recently sold that rotating assemble to another Moparts member and it will be going in his car soon. There I beem rods were junk and have been discontinued. The only extra work that was required was I had to fit the piston pin to the rod which I did at home and I was told to do this in their instructions.