3.5 - 4" lift few questions

I'm the wrong person to answer this really but yes you are going to need all those things at 4 odd inches. Why out of interest are you going so high? It is definitely going to have an adverse impact on road manners and place stress on a lot of components meaning more maintenance and more frequent breakdowns.

The issue is that you are starting to chase more clearance and flex from a small lightweight car. So ok you lift the suspension in a suitable way that everything still works reasonably well and nothing catches, this gives you the room to fit taller tyres which you again get working reasonably well with a regear, that's all good. Then you go and use it properly, not just mincing about but serious use and suddenly you start ripping off chassis brackets because they aren't designed to take the increase in force exerted by the bigger angles everything is working at nor are they designed for the increased rotating masses of the bigger tyres, and if it's not ripping off brackets it's mashing cv joints or bearings. So what do you do, make everything stronger which makes everything heavier which applies more force to everything up stream of the things you have strengthened or modified and without realizing you have created more problems than you have solved. I too like rocky terrain and being from North Yorkshire its predominantly what I have to drive on. However I don't have a lift or even big tyres,I just have some armour plates and follow my own lines to get where I want to be relying on the lightness of my Jimny and it's inherent relative strength to weight reliability.

Personally, having gone down the 3" lift, castor correction arms, rocklobster box, 235/75/15 tyres route, for what you are doing with your Jimny, I think I would stick 215/75/15 mud terrains on it and get some different shocks to match the lift you have now.

Rock crawling is all about picking the right line and if you watch the Japanese doing it on YouTube, you'll see that they do it with very narrow but slightly taller tyres but no gearing change. Yet they do it far more extreme than you are.

I got my Jimny where it is now for mud plugging through deep ruts in woodland. I don't do that now mind.

I'd get some rock sliders though!

Kirkynut