Thanks for the suggestions folks. I think me and the old man will attempt removal with an extractor, if we can't get that to work then I think machine shop will definitely be the next step. It is a 2000 4.0 with 180k km (115ish miles) so it wouldn't be a bad idea to do the head gasket anyways. Was also reading that the 2000 has a tendency to Crack the head so I'll inspect that further.
Plugs were pretty well the last thing I was going to do, already fixed the floors, new torque support boxes welded in and some frame patching. Also already put 3in bds springs up front 2in rear, rancho 5000x, jks mml, completely new sound system, sound deadened the whole tub, por15 the whole undercarriage, cleaned out frame and put fluid film inside, new headlights, did some touch up paint (going to repaint whole thing in the fall), new rad, new exhaust, among countless other little things. I know the frame patches aren't a permanent fix, but the father was a professional welder for 10 years and a structural engineer for the last 20 so I trust him when he says it'll last another 5 years until I can swap in a new frame.
Previous owner was an idiot to say the least. He tried repairing the torque boxes with foam insulation and roofing tar... No joke. Had the headlight's high beams wired to an auxiliary switch for some reason. Other then that though it was a completely stock jeep that's just been neglected its whole life. Just seen the other day someone on here saying "the worst thing about a wrangler is their previous owner" and I would definitely have to agree with him. Mind you I did know the jeep had quite a few issues (only paid 4000CAD) and we have a lift and all the tools in the world so I was okay with taking some time to fix it. It has now been on the lift for 1 month, the end is in sight. I have 70 hrs in myself and the old man has probably put in another 40 just welding/patching the body and frame(I can't weld). I have 10 days off uni to work on it because of this coronavirus so I guess that's nice. Let's see if we can crack a 200hr resto HA.