Didn't Mike use a 260 for the conversion that is covered in the book?
The 240-260-280 all are based on the S30 chassis and are all very similar. The JTR book gives some wire colors for each model, especially on the page Forces was talking about. It is a picture of a hand drawn engine with carb, dizzy, temp sensor, starter, and alternator labled with wires that go to them. Like the other guys said, search arround and you may be able to find pics.