i recently did an ae101 levin.
pretty easy, more fiddly in places than hard....
things to watch:
lenght of bolts, we found the manual box needs longer bell housing bolts than the auto.
rear mount, not sure if its the same style setup as in athe ae101/111 but if it is, you need to remove the rearg/box to mount bracket to get the mount out, and you need to get the mount out get the north south crossmember out... when we had it out we knock the studs out of the mount and welded nuts on so we could put bolts up from underneath.
neutral switch, on the plug that goes into where the selcetors go on the front of the box, there is a plug with 6-8 wires, there is a black wire and black with white stripe, these need to be bridged, wire em up to a switch for an immobiliser.
reverse lights, the manual plug is different and in a different place than the auto one, you will need to get a manual plug and wire it in.
remember i did an ae101 so could eb a few diff things, the wiring is the same though.
hope that helps
p.s if you know any midgets get them to put the clutch pedal in