I'm running a 3.5/5 drop. You won't have to C-nothch the frame. You can use stock shocks with relocation brackets.
The lower stance will help the handling quite a bit. If you don't have one already, you also may want to invest in at least, a front sway bar. The sway bar will make a dramatic difference in handling.
Also, with more than 4" of rear drop, invest in a Super Track Bar kit. It's a longer than stock and relocated panhard bar that helps with suspension articulation.
Your best bet is to buy from
ECE. They may be a tad more money than competitors, but you get what you pay for. Top notch quality, customer support and complete packages with everything you will need to do the job.
