Preheat oven to 300°. Pour orange juice over dates and let soak 5 minutes.
Meanwhile, place almonds, dried apricots, and dried plums in a food processor and pulse a few times until coarsely chopped. Add salt and dates with orange juice and pulse until mixture starts to stick together. Add pumpkin seeds and sunflower seeds, pulsing a few times just to incorporate.
Using wet hands, scoop mixture onto a work surface and form into a log about 1 3/4 in. wide and 1/2 in. thick. Use your palms to flatten into a bar, and cut bar into 8 equal pieces.
Arrange pieces about 1 in. apart on a parchment-lined baking sheet. Bake 8 minutes. Using a heatproof spatula, turn bars over and bake another 8 minutes, or until nuts are toasted (but before fruit begins to burn). Store in an airtight container for up to 4 days.
Note: Nutritional analysis is per bar.