Mike,
Although many say not to use any sealant on cork gaskets, I have always used hylamar with excellent results. It is more impervious to solvent breakdown than silicone sealants and doesn't completely 'set' like silicone, so when you want to take the gaskets off, you won't have to scrape them off.
I recently reset the valve lash on my 2.4 inline 6 in my daily driver 240z and broke the valve cover gasket taking it off (no sealant was used initially), but I didn't have a new one, so a light coating of hylamar on both sides of the gasket and no leaks.
I have used hylamar on all the gaskets on my V8, water pump, thermo housing, valve covers blah blah blah, and no leaks anywhere.
Tim