the BD5 spool fits, so will the gear diffs. Drops right in.
You can use BD5 universals to but you have to switch over to BD5 c-hubs, steering knuckles and king pins. Also will need 5x10 ball bearings. Its expensive but worth it.
You can also do it on the rear, BD5 rear hub carrier and BD5 44mm universals.
You'll need to add 1mm shims to the hubs to makeup clearance.