If the paper base is still ok, no yellowing, and there is no fog, invest in an extra freezer. You can get a small one for a couple hundred.
The paper base yellowed on my 1966 exp date Medalist and Ektalure, but the emulsion is fine unlike the current paper which lasts two years due to the small quantity of incorporated developer. I hear freezing doesn`t help from Ilford. The Kodak was inherited last year, so I didn`t have an oportunity to do much. Sad.
Careful of the contrast grades. #3 was what Agfa considered normal when everyone else used #2. So if you want normal, open a pack of #3. During distributorship changes, a lot was repackaged and relabeled. Test test test. Then label and freeze.