My first post and first Mitsubishi offroader

I did a deal to help out a rellie get into an auto sedan and now I'm the owner of a 1988 Pajero
LWB Japanese import. I've learnt it's an import from what I've read here and elsewhere, and have a few questions
if anyone can offer advice. I only found out it's an Import by accident!

The 2.5 turbo diesel starts easily, runs well with a defined 'surge' when the turbo spins up, it has 250,000km
on the odo. I've done an engine oil & filter change, previous owner[my BIL]fitted new front disc pads, new airfilter,
and fuel filter. I have the new rear disc pads too but the existing ones are only half worn so I haven't changed em
yet. I've figured out what's wrong with the radio and how to fix it with a frequency expander, but the other issues may be
more difficult to fix!
Are these engines reliable if serviced every 5,000km? I'm a truckie so know how to treat a diesel!
Loud 'clunk' from rear suspension on certain types of uneven bumps, all the bushes on link rear end look like
they are perished to me. Easy fix? Who in Sydney could do it?
The vehicle tracks well on the road, but has more rattles than a millionaire's baby on patchy bitumen. Could it be the suspension
is shot and needs new bushes, dampers and coils? is that expensive? Who does it in Sydney?
Body is rust free, and interior is serviceable with great air-con but I would like to fit a 'proper' alloy or steel bullbar, are
the chassis the same on the Japan models as our Oz ones? It has an Australian Hayman Reese hitch receiver towbar fitted so
at least the rear of the chassis must be the same!
You guys/girls reckon these imports are a good thing? Or should I sell and get an Aussie spec one?
I'll be towing my old 'glass half cabin with this old truck, bit of a drop in power from a '97 Ford six! and
the occasional offroad or beach[Stockton]run. It's not my first 4WD though, drives like a [diesel]car!
Thanks in advance............really appreciate any and all advice and help
