My Camburg C/O's also have an allen key to "lock" the adjuster. At least mine doesn't do too much, and I can move the adjuster with a spanner wrench, with a little more muscle, to gain access to the allen without damaging threads. Removing the C/O is a PITA because I have to separate the steering knuckle to get the CV out of the way enough to remove the C/O's lower bolt.
I did a ton of research and many discussions with the Camburg/SAW engineer to figure out what spring to run. I tried adding max preload to the 13" 650lb spring and saw the same results you did- sitting low. I since added the plate bumper and winch, and changed my springs to 14" 700lb springs. I'm at 1.5" of preload while max is 1.75". I achieved (I'm guessing based on CV angles) about 2" of lift up front, and the ride is plush. I'm also just about right in the middle of available droop and uptravel. I posted several numbers from my conversations in my build thread, and all these coilovers are just about the same besides the amount of stroke. All the springs are made by Eibach but may have a different paint job and logo.
Another member runs 16" springs on the same coilovers to acheive height, but at the sacrifice of droop(according to the engineer).
Are your tires rubbing the firewall with the new uptravel?
I'm still debating the 63" Chevy swap myself... I may install the 3 pack AAL I have had sitting in the garage, remove the overload, and throw in the Marlin Crawler U-bolt flip and see how I feel about it...
I'm interested to how you pull off removing the flares since I know you're all about "clean" when i'm more about the ratchet version with pinstripes and all... You could tack sheet metal into the holes, fill with bondo, sand, paint with your line-x, and probably have it look very proper compared to my tacomaworld style plugs.