Hi Roger.
For it to run as hot as that the only thing I can think of is that the years of slumber have caused a load of sediment to collect in the cooling system, preventing the normal thermosyphon circulation, so give it a good flush out with both clean water and a dose of suitable laxative such as RADFLUSH. I would also check that the timing is not severely retarted as that can cause VERY hot running.
Regards. Brian Marshall
