On the output flange, why not just repair what you've got? A replacement bushing should be available, or if not, any machinist with half a brain can make one from a piece of bronze. If the flange hub is worn, a thin sleeve can be machined and pressed onto it to re-establish the proper clearance. On the pilot bushing, I've usually tried for a clearance of about .005". I'll measure an input shaft when I get out into the shop later today and update this post. The pilot bushing is usually made of sintered bronze powder combined with a lubricant, something that's called "oilite". It's supposed to be self-lubricating. The pilot bushing can be a pretty sloppy fit and still work, since the only time there's any relative motion between the tip of the input shaft and the bushing is while the clutch pedal is depressed. A few therapy sessions with a good psychiatrist can usually help a chronically depressed clutch pedal develop a better self-image!
Jerry
