Get a new water pump! Get a rebuilt for $125. There's a post on here about the rebuilts. Nobody has had a problem on that thread yet. I am happy with mine. That pump is run by your timing belt. One small freeze up problem and you could lose your belt and the valves and the pistons. All this time and effort would be a horriable waste.
I did my cam gaset and my rear cam tower gasket about 2 months ago. The job went real smooth. I followed Clark's the the "T" and everything is good!
Put the rear gasket on once the cam is off. Make sure the gasket stays very clean (wash your hands before you put it together) and make sure both mating surfaces are very clean. There are three screws and 3 lock washers. I would buy three new lock washers. There is only 6 lbs of torque on those screws and those lock washers will help keep tension on the screws so they do not back out. Some people use RVT. I am not a big fan of it when you have it this opened up to work on. There should be no problems for a long time if it's a good clean instill with the lock washers.
Clean the mating surface on the head and the cam housing very well. They need to be clean and smooth before you put it back together. Keep an eye on the lifters, they like to fall out.
Just keep track of which one falls where.
You'll prob lose 2 or 3. 4 on a bad day.
I got a nice little nylon wheel to put on my drill to clean off the old gasket. I did not scrape any of it and it shined the mating surfaces up real nice. I got as much oil out of the cam as I could before I put it back together so I was not dripping oil all over the new gasket. Everything went to gether reasonably well.
I would not use a gasket sealer here. The factory didn't. If you do it right and clean you should have no problems.
Those vac lines might be the ones for you fuel pressure regulator and or fuel damper.
While you have the fuel rail off CHECK the fuel hose from the rail to the fule damper. They had a safety recall years ago. All the heat from the cam housing causes them to dry rot, crack, and bubble. A broken fuel hose there could me a fire or an explosion. Mine was real bad, but only on the underside that you could not see while it was in the car. I caught mine just in time! I would hate to see a car get damaged or see someone get hurt. So I tell everone about it.
Change the oil while you're there too.