Mick,

Welcome to the wire. No problem with the diff swap its a bolt in swap. Scroll through this entire thread and there's a link on one of the pages to a detailed write up on the diff swap. this should get you the info you need.

99 Gen 2.5, fixing blown head gasket
89 SWB- 33's, ARB Front locker, SR rear locker/axle, SR F brakes, winch, WST Offroad Armor all Around, 2.85 Aussie T-case Gears (SOLD)
Sold: (2) 95 SR's, 86 SWB, 90LWB, 91 LWB
-Can Change a timing belt in my sleep..