after swapping a 4 spd for a 3 spd, I found that the clutch slave cylinder rod is too long. The old 3 spd had a 'crown' nut on the end of the rod. Even after drilling this out for more sdjustment length, it's too long for the 4 spd clutch connection. Is it just a shorter rod in the 4 spd or is the whole slave cylinder different?