The reason the 100 series is set up like a stinkbug with the rear so high is because the rear springs SUCK with any load
I towed my big trailer the other day from Lenny's and got a major squat, but that thing is a monster so I expected that.
I towed my 14' 4 wheeler trailer with my wife's bad ass pink golf cart today and got a major squat too. I am sure if I had not cranked my front torsion bars to level it, it would have been level though.
Anyway, with 112,000 miles, I have decided to replace the shocks with Bilstein's all around like Martin did and add Air Lift 1000 bags. $357.16 for everything. I don't want any more lift and I think the springs are OK, they are just not really set up for towing.
I ran these bags in my 1996 FZJ-80 and they work AWESOME for $85.00.
Maybe Leonard will have free space on his lift one day, that would make the shock install a snap.
Martin, can I borrow your 7/8 ratchet that we used on yours?
Here is where I got the shocks ($272.00):
eshocks.com: Shocks and Struts: Landcruiser J10 / FJ62
Here is the place I got the bags ($85.16):
https://www.sdtrucksprings.com/index.php?main_page=tracker&order_id=20419