I'm gonna strip my engine down and see what state it's in and clean it all up a little...it's a 2wd cossie engine and it's running smooth and very quiet but it's out now anyway and I want to change the headgasket anyway's so I might as well...

Now what would you renew at the very least?

My guess:

headgasket
belt
mainbearings
conrodbearings
gaskets (duh )

maybe oilpump?