When these cars were in daily use they had none of those upgrades, so you shouldn't need to except if you want to enhance the performance a bit...
These are cars that were built to sit on 85mph down very ordinary roads. They probably lacked a bit in the brakes, certainly compared to today, but they did it day in and day out.
With it having sat for so long you're probably wise to change all the fluids, maybe even a couple of times in quick succession. New oil, run the engine for a while, then change it again, maybe make that first lot a nice thin oil too, flush out the sludgey stuff in there with that. Then a new filter with the replacement oil.
Reverse flush the radiator and block before running it, too. Get the gunk out before it blocks up the rad and gets the thing boiling.
Look forward to hearing how you get on with this...
