Hi I need to put a new clutch in my 67 Bronco 6cyl. My book says that it has a 9 inch clutch. But I haven't found a "9" inch clutch. Grave Yard has them listed for V8s LMC has a 91/16 and Tom's has a 9.25, but you need to grind on the bell housing?? My Hollander's book says that nothing will interchange with my 67. Any thoughts anybody? Thanks