Had these items added for me at an installation cost of $650 - after reading of others self-installing, it was enough for me to spring for this cost due to the complexity and difficulty of doing it myself. The major issues are drilling the number of holes in the axle tube, deburring and cleaning and then there is the welding of the gussets. I am an amateur welder and wanted a great welding job that comes with some backing. HCP4x4 in Denver did my install and it was top notch work. The tubes come with a double seal (can be greased) for the axle end so no need to add the cost of tube seals. The axle tubes, gussets along with my new chrome moly RCV front shafts should be enough to handle the 35's with no problem.