Basically what king sells for a 14" coil over, to be truth full I never measured them. The upper collar is 3" down the tube which is what they recommended.
Which gives me the ride height I wanted and the travel I had wanted.
Would be a good idea to weigh the Jeep with the axles under it, but before you start installing the coilover mounts and coil overs. Gives you a pretty good idea what you need for springs. Weigh it with the front wheels on the scale, then the whole Jeep and then the rear wheels only. Divide the weight for the front axle and rear axle in half and that gives you pretty much the weight at each wheel.
The only thing I need to fudge with is the rear coil overs the dampening on the upstroke is to stiff. Same thing with my buddy's Jeep so we will fix that in the next couple of weeks.
My Tinkering and wheeling thread http://tinyurl.com/pbwdm5u