Camburg coilovers are discontinued, but were made by Sway-A-Way. Called SAW and got the engineer on the phone. Camburg told me to expect 10"-12" of travel with the coilover paired with the Uniball UCA, but this was the same uninformed person that told me they were 2.5" ID coils- which was wrong.
Camburg coilover
shock shaft travel - 4.69" stroke
a 13" 650 lb 3" ID coil comes on it with 7.3" of travel
He suggested sticking with the 650 lb spring rate. A 16" coil will fit and easily achieve 3" of lift, but you will be driving around at almost full droop all the time. The 16" coil adjusted all the way out will have 2.5" of preload. A 14" will fit and have 1.6" of preload. I wrote down 2" of thread showing with the 13" coil. He suggested sticking with the 13" 650 lb coil that is on there, with the bumper and winch, and if I can't get the lift I want out of it, to then switch to the 14" coil.
By the way, the OEM spring rate for the access cab 1st gens is 575 lbs. Double cabs is 750 lbs.
As a note, he said that the preload must not exceed 3" of thread showing with the 13" 650 lb coil or the spring will bottom out.
Eibach spring travel numbers
14" 650 lb 3"ID - 7.41" travel
14" 700 lb 3"ID 7.44" travel