Anything else I should do "while I'm at it"?

[BlackbirdZ07]

I'm a new member here but a long time member of the other forum under the same user ID.

I wasn't looking for a Z but last summer a 1990 with 13,400 miles came along through a co-worker and at the price I couldn't say no. I haven't done much with it until recently. The injectors were original (well, most of them) and the vacuum pump was running full time, so I knew a plenum pull to fix the vacuum leak and replace the injectors was in order. I ordered new stainless injectors from Jon at FIC.

That plenum pull project is now getting out of hand. The crankcase breather cover was obviously leaking oil, so I got the gasket for it and removed it. To remove it I removed the serpentine belt, moved the AC compressor, and removed the alternator. The alternator had a bearing that was failing so I had it rebuilt. Dropped a small rubber hose into the crankcase so I had to remove the oil pan, but that was okay since it was leaking oil too so I ordered the gasket from Jerry's. The front right side of the engine is very oily, so I removed the oil filter housing to replace the gasket. Also ordered the dreaded oil level sensor that commonly fails and leaks lots of oil, so I'll replace that just because it's so much easier to get to now. The oil cooler lines look fine.

So now the plenum is off, injectors and fuel rail are out, alternator is out, AC compressor is out of the way, oil pan is off, serpentine belt tensioner is out, and oil filter housing has been uninstalled from the engine (oil cooler lines are still connected, and I wanted to leave them since they don't appear to be leaking).

My question is, should I do anything else-- replace any parts, tighten any bolts or screws, clean anything, etc.-- while everything is apart? How about the water pump? There's no problem with the water pump and the car only has 13,400 miles and a new water pump is $300+, but it's right there and would be easy to do. Is this something that commonly fails, or should I just leave it alone and expect to get another 50,000 or 80,000 miles out of it?

And please don't tell me to port the plenum and injector housings, I don't need to spend any more money on this thing!