suspention and stering

I would be looking into it for sure. Any lift on the independent suspension system should be designed to lower all of the stock components including the diff. Or have an engineered solution to a problem and new parts to correct it. Homemade or patched together lifts on IFS usually don't work. End rant. The output from the diffs should be very close to centered vertically between the a-arm pivot points. The CV shafts have some room to move in the upper cups but if the axle center line is too high or low you risk separating the CV or cause the axle to contact the cup (over angle).

Your steering should have also been moved down from the stock position. If it is not at the same height in relationship to the a-arm pivot points you will have bump steer issues which could get you in a harry situation.

I bet they didn't rotate the front diff to line the pinion up with the driveshaft either. At a 10" lift that is going to be hard on that front u-joint.

If the axle is centered you can cut the large bands on the boots and inspect the CV through the entire range of motion to ensure you wont have problems down the road. It's easier to do with the newer coil over trucks. Does yours still have the torsion bars or did the lift upgrade the suspension.