1cor6.9-11

Hi, I did a search for "clutch" and searched through 3 pages of results to no avail so I'm posting. I have an 86 carberated wagon; the clutch is starting to slip, how do I change it? Is it a difficult job - will I need to lift the engine or just remove drive shaft and drop trans? Do I need the 8 7/8" 24 sline clutch? Do I need to change the flywheel and other seals while I'm in there?