I am looking to upgrade to some new shocks from the old stockers on my 04' 2WD. I have a PRG mini lift now but would eventually like to add CST spindles and 4" block. Question is if I pick up some Bilstein 5100's now, will they work later with 4" spindles, 2.5" blocks in front and a bigger block in back? I'd hate to have to change these again a year from now. Thanks!