no lift at all, but yes the leaf packs and coils are interchangeable between the gen I explorer and the BII, the coil buckets and shock mounts are exactly the same
the Bronco II used a dana 28 front axle (TTB) and a 7.5" rear axle, now would be a great time to get the dana 35 and 8.8 from the Explorer.
The dana 35 TTB will bolt into the BII, the rear end takes a bit more work, it must be converted to spring over to work with the BII
You would also need the explorer driveshafts, the rear would need to be shortened to fit.
The Bronco II (84-90), ranger (84-97) and Explorer (91-94) all share the same TTB front end setup so lift kits, springs, steering, etc are interchangeable