Thanks for all the help with this one. The thrust block is out, here's some info on what needed to be done, in case anyone else has the same question in the future:
-Carrier must be removed from case.
-Ring gear must be removed from carrier, as it blocks the shaft from being removed (remember, bolts are L-hand threaded)
-Pin needs to be driven out with a long punch (I found this video useful, even though it shows a dana rear - same process: )
-Shaft can then be tapped out just enough for thrust block to be removed
-Remove thrust block sideways, through the axle shaft tunnel
-Reverse the process to reassemble