TJ BB on my XJ?

Hope this is the right forum for this question. I found a guy selling a TJ Budget Boost for a decent price. I need to know if I can use the shocks (4) and 2 of the spacers and then just add shackles for the rear. Its a RE boost with RE shocks. I dont know shock lengths and I see that being the major issue. TIA eace:

i know the spacer should work and the shocks are gonna be close, im not sure if they used the same front design, the rear shocks will work

Stock TJ shocks are only slightly shorter than the XJ stock shocks(1"), they use the same mounting configuration front and rear.