Head Gasket project coming up?

Before you go taking it apart you might try re-torquing the head, probably won't stop it but you never know. Personally if is only a seep after a long hard run that is what I would do and just run it. Now if you must tear it down because it is bothering you that much then a simple off with its head and clean should be a days job depending on how many beer break you take. I am not sure about your 3000 but you have the basic idea on how to do it.

Nothing need be done to your pistons and liners unless you are going to do a complete rebuild. When the head comes off place rags on top of the pistons before you start to clean the old gasket residue from the deck. You do not anything to get on them or go down to your rings to act like sanding grit.

When you start to put it back together be sure to use a sealer on the gasket, I recommend either grease or a light coat of paint. Torque the bolts in the correct pattern, take the torque up in stages 1/3 max value then 2/3 then the final. Repeat each stage until ALL are holding the same torque before moving up to the next value. When ALL the bolts are holding the same max torque then replace your rocker arm and adjust the valves, I like to run though all the valves and set them then re-run them after the engine has been rotated 2 or 3 times. Last thing is the valve cover, I basically just set it on then run the engine up to temp let it cool, re-torque the head and re-run the valves one more time. Then put the valve cover on for the last time and consider it done.