Whew! I don't have an answer on the clutch Denis, but I'm going to try to find out. I did learn from experience though to always check before installing engine that the clutch disc will slide with ease over the mainshaft, but I just always assumed that when they didn't that it was a fouled up manufacture of the clutch disc. Also (hindsight is 20/20) but when they have been in any length of time, when you have the engine out always replace the mainseal and the clutch disc, and probably the pressure plate. There is too friggin much labor involved to go back with questionable parts, particularly when they don't cost much. And Type II splitties are notorious for eating up clutch discs.