I ran 275 fronts of 8 inches long (less weight) with an injected Pinot. 24 or 27mm swaybar Circuit only and handled very well
I'm now at 300+ 16, 18 and 20 mm swaybars depending on what works and comp struts with 200 Block Cosworth turbo. Ill see how it goes next year
 
JP

Gdub

 
Did you make those swages Gareth? 

Hi
As Gazz had stated get a shorter insert or have your insert stroke limited, where they open up your insert and install a collar on your shaft ontop of your piston, that limits your droop keeping the springs retained. I have a Mk 2 with 275lbs 8 in coil overs and are going through the same issue , with untrapped coil springs at suspension droop, I talked to kings springs and they put me onto accurate suspension about my situation and how to rectify.
Hope it helps.

Yes you could use what the link is with helper coil and have the helper extend when the suspension droops and the longer coil spring situation is as "Gazz" stated in his post is exactly what King Springs said to me before I even read this post yesterday, what i was advised is what I've posted . Depends on what you think is the correct way of rectifying the situation. In my situation is limiting the droop travel .