Loras,
I attached a sheet that shows the specs of OME springs for Defenders. I've installed the heavy duty units on my truck and although I thought they were too firm when I first did the upgrade, I'm very happy with them now. The suspension articulates very well and they raised the truck a couple inches, which is what I wanted as I've installed 255/85's (BFG M/T that I'm also very pleased with).
Also attached are a few pictures of the 110 wearing the suspension and tires. Please excuse the bent left wing, the poor deer that I hit looked much worse...
Cheers