Leveling an ARB bar

What is the best way to get the ARB bumper level and the proper distance from the fenders? Mine is on there, but isn't as square as I'd like.

I was thinking some 1/4" spacers and using the floor jack to gently raise the bumper to the fenders, tighten, and then drilling the lock bolts.

What did you guys do?

 

You want at least 1/2 inch gap between bumper and fender, or they will rub and rust. Leveling it, just go around and measure the distances btwn bumber and fender on both sides...

 

I loosened the hardware just enough to where I can position it how I like. Once it was to my liking, I re-torqued everything.