Don't forget the terminal block. Essentially, replace everything with a wire under the rotor. It's a very unpublicized 75,000 mile maintenance area.
If you adjust your timing, don't forget to disconnect the black & tan advance connector wire, right near your power brake booster. To not do that will simply make the task impossible and put the ECM into default mode.
I'd change the brake fluid (to a synthetic that doesn't absorb moisture) too. If you have a manual trans, that fluid, plus the hydraulic clutch fluid, as well.
Since the L98 plugs are such a "treat", consider Iridium Delcos for long life. They resist corrosion from fuel additives better than platinum.
I'd consider differential fluid too, if it's more than a five years old. I'm very happy with my Mobil 1 synthetic and GM friction modifier combination.
Don't go cheap! AC/Delco or better. Chi-Com house brands aren't up to par.
If I recall, either Ecker's or MidAmerica sell a complete (sort of) tune-up kit, with a K&N filter included.