i was running 3" skyjacker's in the front and they were really soft but found out my shocks were limiting them really bad so i just put the rear leaf pack (minus the over load and 5th leaf) for a 1/2 ton blazer from rancho and i cant stop flexing. im around 40" with stock rears in the back and my front skackles havent got vertical yet. they look something like this. im around were lethe is maybe more but still more to go.