Welcome to my world.
The regulator is attached to a bracket. The bracket is attached over a stud that is screwed into the driver side head. There are three things attached with that stud and nut. One is the fuel rail, it's butt up against the head, so it's all the way in. then if you have a heater line going to the throttle body, that line comes off of that side and has a bracket holding in position behind the engine. That bracket is also on that stud. And finally, a ground loop for the harness will be there. (hmm, maybe i put that one back in the wrong place...ground...aluminum?)
Getting the heater hose thing off there requires pulling the matching bracket off the one on the passenger side head. then you can bend/push it off the stud.
I think that's how it worked out.