yer can, but its not straight forward, you need to cut off the old spring mountings and weld new ones on to the axle where you want them. or turn it upside down and ferk about with breathers and diff plugs. then you have to think about yer shocks and whether they will still have enough travel left in them. then there is yer uj's to consider. so a lot of work, if its height yer after why not get some extended spring hangers made?
you still have to think about the shocks and uj's but its easier than remaking yer axle