Hey guys I have a 07 Titan KC 2WD, I currently have bilstein HD with 2.5" spacer up front and 1.5" Block in the back. I was planning to go with the CST Spindle to get a 6.5" lift total. I was wondering beside the CST Spindle packet, CST 3" or 4" Blocks rear, and the CST carrier bearing do I have to get anything else? Is the Upper control arm replacement necessary? Please help. Any assistant is greatly appreciated. Thank you.