So are you saying that its not possible to safely load up 900-1000kg even after a few g's spent on hd upgrades like suspensions?
What I am getting at, is that even with a HD setup from fi OME, You can & shall not exceed the stated max axle load from the manufacturer. Then come GVW, nevertheless how You spread the load, You will have to be within these. X 1000$ spoent on suspention aint gonna change that fact.
The 100 has IFS, the 105 a solid live front axle. I doubt there will be a huge difference in either Gvw nor max axle load. You will probably be able to get your 1 tonn total load into it.thats about it
Please take into consideration that, if You say fit the HD +300kg springs from OME, the emty ride will become pretty harsh once You complete Your trip & drive around "empty"...
IIRC I had +150kg springs in the rear on the LC100, full set of SuperPro bushes added to the stiffness.. Empty-Empty it was abit bouncy. With the LR Fueltank topped up (193l), a drawer system installed, Aux battery in the back, 60l Watertank topped up, swing away spare on the back & finally a roof conversion, the car sat level & was a joy to ride.
Either You need to skin Your load or choose a different setup.
Sorry!
I have worked ( & driven) with quite a few converted Hzj78-79s. They weigh in at around 3400kg ready to travel with fuel, water, food & PI. Usually 2-4 travelling.
They are mostly set up on standard springs (new) & HD shocks of variouse types. Terrain Tamer with external reservoar to name 1 Option.
What I am again trying to bring across, is that here the GVW for a LC100 is 3500kg, Empty they weigh 2600kg. Means 900kg of payload from stock...
If You add fi a winch front bumper, big LR tank inc fuel +++ You will easily reduce the payload down to 650kg... 4 adults & a big fridge I`d say is easily 400kg of load. A roofrack & 60lwater in a tank is approx 150kg...Leaves You with >150kg for PI, Food, Beer & whatever else You may want to haul.
If You feel these numbers are unrealistic, say so
Edit; Typo&more info