I have been running a 1.5" t-bar lift since very soon after I bought it new. I have near 135,000 miles on it now and have incurred no damage to any of the front suspension or drive axles. I did install new Bilstein shocks at around 100K miles and they were stock replacements. The only other work done on the front has been front end alignments a few times.
I did raise it a little more after about 5 yrs to compensate for a little relaxation in the suspension. It still works well but I am expecting I will need to change the ball joints within the next 50K miles or so. They were still good at my last alignment (around January) but I did have to have a camber kit installed.
2002 FX4 Bright Red Supercab 4.0 SOHC, manual 5-spd & Tcase, 33" BFG MTs, K&N air filter, Modified air box inlet, Gibson SS cat. back exhaust, Bama flash, Hidden Hitch round receiver, Rear helper air springs, Electric trailer brake controller, Line-X bed liner, WAAG bar with KC lights and Wildernest shell.