U joints, gears, locker, and even a little brake work is common for 60 swaps.
However with that housing your looking at kingpin rebuilds (no cap), PIA gear install since no starting reference on shims, hubs, all new bearings, races, etc.
The shafts aren't a big deal really other than they are nice to have as spares or run until you break. For 42's most are going to run alloys at the very least 35 spline alloy stubs.