Interesting design that does not limit droop. However, this kit would not work on a LC without reversing U-bolts or SOA. Options are pretty limited to parabolics... for now
Simple to solve that with a u-bolt flip kit.
Not many options for off the shelf bolt on. I have built three very heavy overland trucks from the ground up, the Cruisers all weighed over 8,000lbs and the Tacoma was at 6,000lbs. All three had air bags. Granted only the Tacoma was on leaf springs but it flexed better than the Troopy pictured above with air bags in it.
It is like people with shocks, they don't seem to understand that the best way to figure out what shock works best in your truck is to cycle the suspension from compressed and extended with no shocks in it and take measurements. Instead they just want to buy some off the shelf shock that will do it. I am the opposite, I want to learn what is the best way and then that is how I want to do it. At least when it comes to my uses and my applications. Like for example, the 80-series rear suspension is all messed up when you plug it into a geometry calculator but for my uses, I don't feel the need to modify it. It works for me and what I have used it for even with all it's downfalls. I even owned a diesel at one point that had a shaved sump with custom built gear driven 5-staged oil pump a custom turbo and a super charger with x2 intercoolers. Ya see, that is my style and how I like to go. Lucky for me I have for many years had friends that can build just about anything from scratch so I have learned a lot from them. Pirate4x4 helped a lot too when I was getting started.
If ya want to solve issues like flex and weight carrying you should look outside the box and be ready to do custom mods. I got away from just doing bolt on solutions more than 10yrs ago and went the route of solving problems and making a truck just how I want by customizing it. I have done all kinds of things people say you shouldn't do or that people don't do such as; 35" rubber on an FJ60 that was sprung under, flexed like a beast and had zero rub. I also cut & turned the axle on that SuA truck and ran a high steer kit. Rather than buy an OME off the shelf steering damper, I bought custom bits to build the bracketry myself and I installed an Icon steering damper not even for a Cruiser application. I have cut & turned an 80 that was lifted 4" to fix caster rather than install a bunch of bolt on caster correction junk. I have built my own cross members and motor mounts from scratch. And much much more. I bought tools and I learned and I went for it. For me this is the best way to solve issues or get a truck how I want because there is nobody to blame if things don't work out and it costs much less than paying somebody. Plus I enjoy learning, a challenge and working on trucks. Some people argue you can never make it better than Toyota designed it, I strongly disagree. And for me at least 50% of why I am into trucks is because I heavily enjoy making one better. Many of my ideas have been copied such as the aux fuel tank I put in my Tacoma or the custom rear bumper it had on it, hell I haven't even owned that truck since 2011 but a few months ago I got an email from a guy wanting all the build pictures of it so he could copy it. When I built an FJ142 I chopped the frame at the unconventional location because to me removing a lower link bracket made the whole job 1000x easier than cutting the frame where it is angled. This is just how I do things, I overthink and plan a lot before I execute. Seems to be a rare thing here in the 70-section, customizing things like suspension that is. I am looking forward to getting into some customizing on future 70's I own. I got all kind of ideas rolling around in my head on how to make them better without doing just bolt-ons. Troopy covered to coil springs!? Yup that sounds great! HJ75 pickup with a Chevy v8? Awesome, I can't wait! You get the idea.
And by the way converting a Troopy to coil springs will make it much easier to get good flex and carry weight. Progressive springs, in particular Slee 4" HD's.
Every truck is different, and there are many types of uses for these trucks. Cookie cutter off the shelf bolt on stuff is just not for me when I am trying to solve issues but that works for the vast majority of people out there. So ya, parabolic.
Cheers