Firefly---
The FIRST thing to do is get George's CD on Listeroid Longivity. Â THAT'S the best 'spare part' you can buy.
THen, starting at the top and working downward and only speaking from my own experience with a dirty engine,
http://www.utterpower.com/jack_belk.htmBe sure to check out the photo album of over a hundred pictures of every stage of re-working an engine that's likely to about the same as your's...
Parts--
Rocker arm bushings        (2)
Fuel injector rebuild kit       (1)
Valve guides               (2)   rebuild the old ones with bronze bushings
Valves                     (1)
Intake and exhaust gaskets    (6@)
Headgaskets               (6)
Piston Rings               (2 sets)
Wrist pin and rod bushing      (1 @)
deck spacer gaskets          (1 set)
Fuel pump rebuild kit          (1)
camshaft end bushings         (1 @)
main bearing shells            (2 sets)
inspection door gaskets         (several)  This gasket should be soaked with RTV and let dry.
Tools and stuff---
utterpower governor kit
utterpower CD
ya'll add in whatever I forgot. Â Â
Titanium-- Â I'd like to see pictures of your engine that's run 10K hours without breaking something....and I'll have a bunch of questions, too. Â Welcome