In almost all cases you have to heat the baseplate with a propane torch to get the APT screw out. About 95 percent of the time they come right out with some heat.
I would get rid of the long length of rubber fuel supply hose and run a solid metal line to the fuel pump.
The factory burned a lot of good families to the ground before they started doing this. It is NEVER a good idea to use any rubber fuel hose on the pressure side of the fuel pump and if you do make sure to put a "bulge" in the metal line so it can't slip off......FWIW.......
