I borrowed my wife twice while doing the bumper install, just to hold a wrench on the bolt heads while I took the old nuts off, and again when I was putting the new bolts in and she would do the same thing.

One thing I would add. I have a lot of extra brass and stainless rifle and pistol cleaning brushes. ANY TIME I take a factory bolt out, and it had thread fastener on it, I clean the old threads out. This includes the bolt threads (if necessary) and the threaded area it is going into. I use a short "pistol" length handle, screw the brush on and just keep twisting until the threads clean up, then blow them out with the air hose and check them with the bolt that is going back in. Of course a thread chaser is fine also. The worst feeling in the world when tightening a bolt is for it to suddenly get hard to turn and you keep going wondering if it is just old thread lock material......OR is it a problem. Like the old saying...."Pay me now or Pay me later".

 

It is very simple, just 4 bolts. I think the worst part was laying on my back.