Still trying to dial in the clutch, I shortened the clutch pedal rod and increased the length of the slave cylinder rod to try to ensure the clutch is fully engaged when released and all the power is going thru the transaxle. But is there some more formal way to ensure no slipping, for instance taking off the retention spring on the slave cylinder, put in gear (while car is off of course) and see how much play there is. Obviously if there is no play in the slave cylinder when gear engaged then there still may be force applied t clutch