My truck started with a 4.5" WH lift, 1" body lift and Cage long arms. I was running 36x15 tires no problem with this. I am not changing to 14" from coli overs and will I think be running 35x17 tires. I am going to link the rear also not sure on shock length yet. I want mine lower than it was before with much more travel. With your 5.5" lift 37's will be no problem.