B6000 injector removal

[jaggardenercolin]

Hi, I am the long-term owner of a trusty B6000, recently it has developed a leak of fuel at one of the injector seals. Any advice on removing thses injectors would be great. I have new seals ready to go in, but the injectors have been in place for all of my ownership (30+years) and don't seem want to move.
Thanks in advance.