making room for bumper

i have a 90 xj and i am going to start a bumper and i would like to know what all needs to be removed or altered. i know i'll need to trim the stock fender flares. any advice would be apreciated. mainly things that need to be relocated or thrown out.

Front, if you have the round oval black canister mounted to the inside of the bumper, needs to be relocated. Thats all on my '91. The rear involves nothing, at least on my '91.

You could trim the front fender straight with the bottom of the turn signal/grille.

Before I did.
http://i34.photobucket.com/albums/d112/jeepin789/Jeep%20pix/100_0672.jpg

After.
http://i34.photobucket.com/albums/d112/jeepin789/Jeep%20pix/100_0878.jpg

I don't have any current pix of the front bumper, but I do my rear.