Cheers mate - may take you up on that! Will PM.
I fitted +30mm offset disco rims when I fitted the wide tyres - that made the steering a bit heavier due to the increased scrub radius. However, there is no way I would go back to 7.50s - the handling and offroad performance is so much better with the MTRs. I will be trying to fit in as much offroading on the trip as possible - not just staying on the main highway.
Brian - I have 2x70 L (custom) tanks. I might take a couple of jerry-cans, but that should do IMO. I get about 10 l/100 when sitting on 80km/h.
60 series PAS conversion is pretty simple, but maybe it might be a better idea to leave it... will see...
EDIT - BTW - anyone need a landie transported from Sydney - Perth??? I have some friends who are planning to tag along, who are looking for a vehicle (will hire if nothing else comes up). Best hire deal so far is $60/day.

