I know that the ZJ coils and XJ coils are interchangable for the front with the ZJ coils being stiffer. But are TJ coils interchangable with a ZJ? I wouldnt think the rears are just because the way they are designed but what about the fronts? If they will work, will they net the same amount of lift or less? For example, if I were to take 4.5" TJ coils and put them if the front of my ZJ, would it net me 4.5"? Thanks for any input.