does anybody know where I can find a clutch and a pressure plate for a 1967 super 300 Austin-western grader with a 15 disc?
Give Thill Track and Tractor in Eau Claire, WI a call. They have 70+ graders in the salvage yard and are very knowledgable. They may know where to get a new one to.
The numbers (and name?) off the pressure plate might help you more than the model number on this one. The engine model, diameter of the bolt circle and number, number of splines on the shaft/disc and diameter of the shaft would all be useful information.
Is that a 471 Detroit in that one?