Hey mate,

Diff: $400
Re-bracketing around: $400-500
Rebuild calipers: $100
Redrill axles/disks: $200
New Handbrake cables: $150 or get creative with the existing gear.
LSD: New - $600 Welded - cost of wire!
Shorten tailshaft - $100 or new $600.

I haven't checked the bearings but worst case, bearing kit for centre is around $120, wheel bearings - $80

Sounds like a lot but keep in mind you will NEVER break this (unless you're running 400+rwkw). Do it once, do it properly.