You can put it in now if you want. A lift has no effect on the install. If you're getting any bump-steer, a stabilizer setup will dampen that out. I get a considerable amount of bump-steer with 35s, but I'm sure my stabilizer shocks have just about had it.
They're pretty easy to install, basically the setup is u-bolted to the tie rod and axle tube. Some axles have a pad welded to the tube to mount that end to, some tie rods are drilled for its respective end. Dual setups come in a parallel configuration, or an end-for-end configuration. The end-for-ends give you a little more ground clearance.
Shop the 'Net, the local 4Wheel Parts store, or else consult 4 Wheel & Offroad magazine, there's a ton of vendors that advertise in there.
