I could crank my calmini up to get 4" of lift... Issues are the cv's will bind, they barely have enough movement for 3"
I'm guessing this is just a front end lift?
Yep.
Interesting that they only list it for 2WD though. Just by looking at the arms, there is no reason I can see that you couldn't use them on a 4WD. The UCA has no bearing on the CV shaft coming to the hub.
And yeah, on a 2WD truck, you can lift higher because you don't have to worry about the CV joints.