If you can't grasp the end with a set of vise grip pliers, run a tap into the fitting, leave the tap in and clamp the tap in a vise and gently tap the carb with something soft like a peice of wood. It should come on out.
I sometimes want to use a stainless braided line going into the carb. To do this I take a 1/8" NPT tap and cut about 3/8" off of it. TRhen I use a tap that has not been cut, tap into the carb as far as it will go, then use the "short" tap to finish the hole. Now I can run my SS line, looks cool and is veryu reliable. You could substiute a 1/8" barb fitting with a hose if you like