If I install a pro-comp or fabtech spindle lift on my 1999 2WD, do I have to replace the shocks right away? Reason being is my current set is still good. Im not sure if installing the lift will require longer front shocks. Also if I put 1.5" blocks in the back, do I need to replace the rear shocks as well? Thanks in advance.

i did not try it, but 4wheelparts told me i did not have to replace the shocks. to me that does not make sense, becuase you will be adding an extra 3in of space between the control arms. i do know that adding the 2.5 in lift coils i had to replace the shocks on mine.