Once again thanks for all your awesome comments!!
It is 4x4 with low range and lsd. Unfortunately no trips planned as I have to unfortunately sell it....
Went with a 50 mm insulated body as used for refrigeration trucks on steel subframe with the usual springs for articulation.
Will post build pics over the next couple days/weeks. here is the first instalment
This is the original vehicle was a fire engine for wood plantations
Testing a little offroad note the chassis flex and there was no spring movement at all and all wheels on the ground....
Managed to source an identical tank from salvage yard so now we can drive a bit further....
It is such a pleasure to work on these trucks its like mechano all holes are there, just plug and play..try and fit a spare tank into car or pick up!!!
Connect both drain plugs for a balanced system and thats it. even managed to have locksmith fit truck key to both caps