Is it correct when it says the FRONT and rear are blocked? If so, that may be your problem. Its commonly said to NOT limit the travel up OR down on the front suspension. Simply lower the bars, have tire pressure low (35 or less) and have the correct supporting items like tierod sleeves, centerlink or pitman/idler arm braces. Nothing else needs to be done to the front. I have pulled twice. Once with weight up front, once without. Both times the front end was fine and I had no bounce. I do block the rear w/ 1" of travel.
C-ya