I replaced the rusted oil pan on my 1993 F-150 4.9L (2Wd 5-spd) myself. It took 4 hours but probably a pro could do it in 2.
My repair manual (starts with an H) listed extra steps like: remove the radiator, remove upper plenum, and remove starter.
Actually there were only three things to unbolt besides the oil pan:
1) the positive battery cable
2) the cooling fan (with clutch)
3) the windshield wiper motor (unbolted, and not completely removed)
I avoided removing the plenum buy moving the windshield wiper motor clear of the plenum. I had to wiggle the pan to get it out. I didn't have to force it, just position it exactly.
Here are the detailed steps I took plus some annotated pictures:
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