Took the plunge last weekend, and wrenched on the Z seriously for the first time (only other thing I have done till now was replace the alternator)...
All preventative maintenance items done included Beisan oil disk, Beisan vanos seals, Beisan upper chain guide, upgraded cam bolts, shimmed the valves while I was in there (3 were out of spec) and replaced the plugs.
Took me about 10 hours to do all of it, but wow... does she ever drive smoother and quicker after the work!
Just turned 54k miles right before I did all of this, so very close to time for oil change #2 and probably another road trip to the dragon once spring finally arrives!
And I have to say thanks to @bignosejim -
https://www.zpost.com/forums/showthread.php?t=1112938