I have a 2009 f150 5.4l v8 lariat 4x4. The factory shocks finally went out in the front and I'm looking for replacements. I have a 6inch lift installed as well. I don't want to spend more than 400$ on front shocks but I want to buy them pre assembled. I want new coilovers and all. What's the best shock to buy that I don't have to do any breakdown and re assembles. Just remove and replace.