"How did you get the stud out?"
tough one ....... my issue was that I hadn't fitted the pipe union at all when I had the motor out for rebuild .... "I'll fit it in the frame" thought I... bad move, so I had plenty of stud to grab hold of.
This is another case of " Why the hell is it a stud and not a bolt?". Life would be much easier if it were a bolt, 5/16th UNC
would do nicely (according to my parts book). The argument that the constant removing and replacing would wear out the threads in the ally hardly holds true here.