Because I was looking for value for money in an older 4x4 I was impressed by the Holden Jackaroo,as it has always been under valued in $ terms, relative to its ability.
As I'm on the dark side of 50 I started from the default preference of manual diesel, as that was the 'thinking' of what a 'real' 4x4 was back in the 1980s.
A few questions on here and a bit of googling quickly convinced me that the later Jackaroo (Isuzu) diesel was EXTREMELY 'problematic'.
Likewise, that auto, rather than manual was the way to go.
Having done some 4x4 training in my $7250, 2000 Jackaroo Monterey, I'm damn sure it, with its LSD rear diff, will let me tow anywhere I want to go, albeit using the chicken run if I ever get to 'Gunshot'.
Not even going to bother with a gas conversion, as for the $7000 it would cost, I'll buy a damn lot of fuel, and a long range tank. Besides, gas not necessarily easy to re-fill in outback areas.
So, my advice would be go for an 1-15 year old petrol 4x4, and enjoy the best value for money in off-roading!