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Old Bastard !
Joined: Fri Dec 22nd, 2017
Location: California USA
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If the engine is running good, and your only problems is the oil leaks, then it could be worth pulling the motor and replacing all the Oil Sealing Gaskets and not fool with the head gasket at all.
IF the compression is in the normal range, your spark plugs look as if they have been burning normally, (Nice light brown haze over them), and your oil pressure is in a good range then a head gasket might work out for the better.
While you have the front cover off, replacing the gasket, you might do a timing chain, also it would be easier to replace the water now at this time.
When you replace the Oil Pan gasket, clean out the oil pan, see what is in the bottom of the pan... clean the pickup also.
Replacing the oil pump sounds like a good idea but unless your oil pressure is low it is your call about changing it.
Last but not least, replace the Clutch assembly, the pilot bearing, AND get the Flywheel resurfaced. Resurfacing the flywheel is subjective. you can and the best way, would be to send it to a Machine Shop that handles that work and have them do it, BUT it is possible to grab a hand grinder and with care run over the flywheel, using a back and forth motion while moving around the flywheel contact area.
You can do all of these things, put the motor back in and fins out one of the sensors you removed and replaced isn't working now that it has been moved, be prepared to do some diagnostics if something isn't working as it did, AND nothing say the motor will run the same and won't cause you grief.
Before you start your resealing and part replacement project... check out a new long block, maybe some sort of upgraded version of your motor is something to consider IF you go the Long Block Replacement route.
What I wrote is how I would approach your truck project... IF I wanted to try and get another 100+ K miles out of her.
Not meant to be a guide just recommendations and to get an idea of what might be done to make sure you won't need to do additional work on the drive train after doing the oil seals.
Good Luck on your choices.
____________________
Ltr,
2003 EDGE, Std Cab, Steppie, E4 Red, 5sp, 4x
5" SuperLift, 33" x 12.50 x 15"
Hurst Shifter
Mod'd Backrack to fit Steppie
Front and Rear Bumpers by Custom 4x4 Fabrication, OK; now Mike's Welding and Fabrication.
Working on more Mods, just need more time, longer days would work !