In order to ride more level when pulling our 5th wheel, I did look into using 2" trailer blocks, but I had concerns if they could the stress of turning, specially the rear axle. I went to a local spring shop and they suggested what they do, which is use 1-3/4" wide RV springs cut to the length of 6" and stack them until you get the heght you need. It took 6 springs each for a 2" lift, along with longer center bolt and longer u-bolts, which overall was a lot less ($326.00) than the trailer blocks I was looking at before with the same hardware. I installed them myself over a year ago and no issues at all with this type of 2" lift.
Ed & Laureen
2005 F-250 4X4 SD 6.0 Powerstroke
2009 Cherokee Wolf Pack 285wp (the side door ramp toy hauler)