AZJeff

I want to re-install a front sway bar on my 1989 MJ, and I always assumed that all sway bars for the MJ/XJ family were the same, and only varied in diameter from year to year. But...I several places I have searched, they talk about the sway bars for later XJ's only fitting vehicles from 1991 or thereafter. Is there any limitations to putting a sway bar from a later XJ onto my MJ? (Yeah, I know I need the right size bushings and appropriate end link kits.)