I' not sure about internals, because my dad looked after all that.
But,
Carbies,
Extractors,
Electronic Ignition,
Electric Fan setup,
No air con
Currently Running Ethanol.
Are just a few things I know that have been done to it :P
Edit: Just asked dad
New rings,
New bearings,
Machined head,
Full Balanced,
Set deck for 10.5-1 Comp Ratio