I have a 1977 FJ40 with a SM420 installed by Earl Warden of Placerville back in 1994. The throw out bearing has gone bad and it is time to replace the clutch assembly. Wondering what Earl used as the clutch? Was it a Toyota original clutch or did he use a Chevy, or some other clutch like Advance Adapters. I would like to buy the correct parts before starting the project. Any help would be greatly appreciated.