I am running 2 engines now and have converted a total of 4. I posted a link to webshots that is a series of photo showing how to do it, or how I do it. The critical thing is reversing the drive, and changing the spring to one wound in the other direction. The next important thing is the outer support bearing. In the webshots album I show how I locate for the bearing, if you don't install this bearing the starter shaft WILL bend. At this time I have one on my 6 volt Winfield flathead, cranks slow at 8 to 1 but will start. To locate the spring go to the starter shop, take your old spring and tell the guy "I want one wound the other way" very simple process. I have seen a part # for the spring but that might be more confusing.