After the lift is installed, will the front axle be off-center? Will there be a noticeable difference when looking directly at the front-end. Not to single out the 4wd lift, is it something that they all will do?
Yes, all lifts do this, even a BB. Most lifts above 2" come with a rear track bar bracket that moves the rear back to a normal position, but the front requires either drilling a new hole for the trackbar mount on the axle or getting an adjustable bar.
I've got the stock front in mine and it's no problem at all. I've got the 4WDH 2" lift which actually netted me about 3". The front axle is slightly shifted but not too bad. The rear was where I had an issue. I went up a size to 31X10.5 on my stock rims and the driver's side rear tire was almost rubbing on the upper spring perch. I installed a Teraflex adjustable rear trackbar and recentered the rear axle. No vibes to speak of with this setup. I think the whole axle is shifted less than 1/2" in the front.
Next stage of lift is going to be a RE 3.5 and I'm planning on an adjustable front trackbar at that time.
I'm running a 4" lift with a stocker front end...Used the drill & relocate method... no vibes from the front (as far as I can tell, running 33" Truxus can't directly feel anything other than the tires, boing) but I do have issues in the rear, so now I have to install a SYE.