I pulled my head without the intake and exhaust for a new head gasket. Some of the bolts are by feel. Your head is probably warped and will need to be resurfaced at a machine shop. May as well do new valve guides and seals while you're there and all new rubber water hoses. You'll need a hex allen type tool, 10 mm I think for the head bolts. I got a set of 3 sizes at Advanced Auto for about $10 last year. Read the manual carefully before you start. Except for the part about taking the head with intake and exhaust off as a unit. Took me about 8 hours to remove and 5 to replace. I am not fast.

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85 300 SD ~ 115K
82 500 SEC Euro ??K
78 450SL 164K