Can it be done ? Sure anything can be done with enough welding and cutting
Will it look good ? NO !!
It will look like exactly what it is, a bumper from another model, not the right width, will not fit the front curves that KJs have and look like you went to junkyard and just grabbed anything
The TJs/ JKs etc have a flat front, KJs are curved, so you end up with center touching the grill and the outside edges sticking way out in front of the flares
PLUS the fact you will never get it bolted on as strong as an ARB and have seen pictures of many of them torn off due to just slapping them on
IF and I say IF there was a bumper from a TJ/JK/ etc that looked like it would fit right and look good I would of done it YEARS ago.
I even have a mount welded up here to mount a TJ bumper to, that would be easy to fit, strong and dependable but never found a bumper that would not stick out like a zit on the end of your girlfriends nose
Now if you want to know how I really feel about it