As suggested above, the paper box should contain the filtration settings for your enlarger. All very well in theory but my experience is that the figures are usually ballpark at best. And if someone has been fiddling with the enlarger internals then all bets are off.
Best policy is either to use a VC head with a single dial (which is in good working order which you won't know until you get it) otherwise use ilford filters, above or below lens.
Ilford filters are speed matched to print density 0.3 on ilford MGIV which is around zone 7 or 8. But even that is a wooly concept because paper loses contrast over time and the speed point moves as well.
Or you could try and calibrate your settings but that is a real PITA and paper still loses contrast over time.
So to make life really simple get a set of ilford filters.