I recently did a 1.5" sectioned crossmember with a 1" body drop on top of that. I had to notch my upper arm quite a bit and then reinforce the area. This was all done to the stock arm. To correct the erratic steering you might have to flip the outer tierod from the top to the bottom of the spindle. When you section the crossmember, everything on the steering stays in the same location
except the outer tierod, so you introduce a ton of bumpsteer. Flipping the tierod to the bottom eliminates most of this. I have mine set up like this and it steers very nicely.
