When I was in college, I used 35mm "Movie" film used to film documentary work during the Korean War. This was in 1965-66 and the film worked just fine. What I see more often as a problem is outdated paper, but that is also an easy fix.
The additives you would be interested in are bromide and carbonate. Potassium Bromide will clear the whites. (reduce fog). Sodium carbonate will set the blacks. Use either or both. Expect increased exposure times. Mix both to 10% solutions. To a working tray of print developer, mq type (Dektol), say 3 liters total, add a couple of tablespoons of additive. Adjust as you print. Additional bromide used to be common. It was packaged under the title, BB solution. For further help, refer to 'Lootens On Photographic Enlarging and Print Control.' With old paper, the bromide may be enough. A big advantage of working like this is the fact that old paper is aged, and very stable, whereas fresh paper is green and not mature.