Thanks for responding, I understand the instructions - I think! It's pretty cut and dried the way it's presented.
It just seems odd that I wouldn't need any of the supplied spacer washers to make things fit back together. I've darn near sprained my neck and shoulders pushing up on the servo piston trying to make it mate! Even removed the O-rings to loosen things up for trial fitting.
Did they tell you any black magic or anything?
This is a '75 T-400.