What you have is a 9 hole 11" clutch, they were used on big trucks of the era. You can't get a new one but you can get it rebuilt or do what I did and have your machinist drill the flywheel to match the six hole clutch. You may also need to get the flywheel balanced as for some reason these clutches and flywheels were balanced as a unit.
The other option is to get a new flywheel for your truck. if you do this you'll have to know which starter you have (6 volt or 12 volt) as the number of teeth on the ring gear is different.
Steve
