The 7.3L in your truck has just died and it is time to go shopping for a new motor. You call your local junk yard and they say they have a few 7.3L engines to choose from. When you get there you notice that there is just something different about each motor. This series was created to give you the tools to be able to tell the difference between first generation (1994-1997) Power Strokes from the second generation (1999-2003) Power Strokes and to show you which year model motors are able to be interchanged into a different model truck. You will also be shown how to interchange E-series and F-series motors into each other.