Sideways nails it with the tech. That's pretty much everything you need to know., along with this:
viewtopic.php?f=5&t=52270No offence WattsieJase, but I don't know what "weapon" means. I guess, at best, it means it's likely to be more capable than your current car. That's easy with either a Jimny or Sierra and mild modifications.
Sierras and Jimny's aren't like big cars - Suzuki owners adjust gearing to suit tyre size and improve off road performance. Mostly, big car owners live with poor gearing (and might make small adjustments) and increase power to overcome the effect of larger tyres. Very few big cars (Late model Defender and JK Rubicon being exceptions) are properly geared for off road work)
Whilst there might be some benefit in a 2" lift, neither a Sierra or Jimny functions properly with 3" of (suspension) lift. The increased spring rates required to maintain the increased ride height reduces flex, reduces ride quality, and reduces stability. In any case, suspension lift doesn't have anything to do with fitting bigger tyres, only bumpstop spacing, guard cutting, or body lift provide room for larger tyres. Remember too that a 31" tyre is 20% bigger than a factory tyre on a Sierra. That's like putting 37's on your prado, and while, as you can imagine, it makes the cars very capable and is quite easy to achieve on a Sierra, it does require gearing and possibly some driveline upgrades, depending on your use.
I'm not sure where you're located, but I'd recommend hooking up with a local suzuki club before you decide how to build a car. Sierras, in particular, are so much more capable than a larger car if properly built and driven it's hilarious, however, lots of people apply the same mods they'd apply to a big car, smash their way around in a poorly geared, overloaded, car, and then loose interest when it's unreliable or broken. In a club environment, you'll be able to learn from very experienced builders and see first hand what works and what doesn't, and how to drive these cars.