The front is easy.
What's the bump stop clearance now ?
You need to use a spring with the same rate as stock and a longer free length.
The closest off the shelf is the LRA/Rangie Spares 'Purple' (Browns Springs make them for LRA) @ 220lb/in (OE is 225lb/in) and nominal 17" free length.
(mine were 17.2" when delivered)
This will give around a 40-50mm lift on a 130 with winch and barwork and is still soft enough to visit the bump stop pads regularly. (mine are nicely polished)
I use TLC 80 Series Koni's (reduced low speed bump) to maximise droop travel although the bottom pins need shortening and the towers raised (N73 OME's may be easier, as they have a better closed length and may not need the towers raised, but I'd cycle the suspension first and allow 20mm bump stop compression at a minimum)
These springs have settled on my vehicle to a round 105mm ATM. When installed five or six years ago they measured around 117-114mm drivers/passenger side between the bump stops.
The front anti-roll bar needs to go if you want maximum droop with this set up too, otherwise the front prop will hit the ARB.
Brake lines also need extending. (it's a good excuse then to fit braided lines and you get the improved pedal that goes with the addition)
Stock Bilstein's with any lift like this will limit droop too much IMO.
The rear I'm still struggling with as most of the time I carry 4-500kg.
Soon to have air bags in the centre then I can play with rear spring rates. Currently running some long travel Monroe's (modified leafy Patrol shocks) but I can't get the low speed rebound I'm after with a simple fluid change (also running higher than OE gas pressure)
Mid and high speed damping is just OK.
I'm not a fan of Kings, as there is history there with some custom 2.25" race coils from yeas ago. Rate was spot on, but they all took strange sets and leaned over like drunken sailors. Not what you want on a race coil spring.
<edit> and I've never bothered castor correcting the thing either, it still self centres and doesn't really wander too much, and I was a fan of winding in massive amounts of castor on the race cars I used to work on, sometimes up to 8* !



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