[racin161]

Bow first I wouldn't think even a service manual would have the bushing diamentions just part numbers or amount of movement limitations that would require replacement of the bushing. From past experience I don't think they want you to make your own there in the biz to sell parts as your aware I'm sure. With that said 90 is right on if you would like to make your own bushing which would require measuring the good part of the shaft for the OD +.002-.004 for clearance for the ID of your bushing - then the ID of the clutch and add +.002 for your press fit. Then you have your working diamentions. OR just buy one. Sorry if this don't answer your question but that's how I would go about making one.