606 glow plug help, I am stuck

[Racekar]

Well I started to get the glow plugs out, only 3 and 6 are giving me trouble. They are totaly screwed out but are stuck and will not come out any further. They turn stiffly with a wrench but I can't pull them out. It makes it harder that they are the only 2 glowplugs that are blocked by the oil filter and the injection pump. the others screwed out by hand after I broke them free. Any ideas other that PB Blaster which I am already using. Is there some type of puller that could get in there? I can just about get a 1/4 in drive socket on these two glowplugs because of the space limitations. Any ideas or help would be appreciated.