Good comprehensive list from GP.
When I did mine, no machine work was needed - everything was still well within spec. Honed the cylinders with a coarse stone and lapped in the valves.
I replaced all bearings, rings, gaskets, bushings in engine and transmission, along with new MkIII isolastics.
I rebuilt the carbs, and everything looked good, but I couldn't get it to idle properly. I ended up springing for new Amals ($195 apiece), as the consensus was that the slides were too worn, leaning out the mixture.
About 1500 miles so far, and nothing has flown apart.
Check your rotor while you have everything apart. It seems the steel core has a tendency to separate from the main body, with potentially catastrophic results. Mine was loose (about 5 degrees of rotational play) so I sprung for the Wassel one.