[aeroace]

If using an external slave cylinder with a fork and conventional TO bearing, the adjustment of the ball stud which the fork pivots on is CRITICAL. The TO bearing should be approx .100" of the diaphram with the slave cylinder's pushrod retracted fully. If it's an internal hydraulic TO bearing, that needs to be adjusted so that in the retracted (compressed) state, there is .080 to .120" clearance between it and the diaphram. If all clearances check out, you just need to keep bleeding the air out. Also, is your clutch master cylinder volume adequate to achieve the travel needed at the clutch.