I have a 1986 W150. I would like to install a 2.5" lift and run 32" or 33" tires. I noticed on the Skyjacker lifts you can either add springs for the added height or get a kit that totally replaces the stock springs and removes the block. I would like to eventually have a pop-up camper on the back (nothing big, probably not more than 1500lbs). If I do this, should I maintain the block and added springs or would I be OK with the entire lift kit and did away with the block? Thanks for the help.