Expo leaves will get you about 2" lift if you leave the stock shackle on and stock block. 95-01 Explorer, -05 Sport, -05 Sport Trac.
I'd do the expos because they are so plentiful out there. I would also ditch the stock block and run Belltech 6400 shackles with the expos. This will give you some variability in ride height back there....with the stock block removed, you'll be able to have the ability to have a straight up 2" lift or 1" lift depending on where you put the leaf in the shackle. Or....once the cap goes on or whatever, you can always add the blocks later or just keep 'em on or even choose a taller 9" eye to eye shackle instead of the 7" eye to eye 6400 shackle.
*all these numbers are unloaded, without a cab or loaded toolbox.
'01 XLT disguised as a '03 Fx4 Level II
Big. Loud. Slow. Bright.