Installed my Toytec 1" BL last May. Fan clears the shroud, but just barely. I installed the steering spacer, pita but worth it for piece of mind. As for the bumper, I was concerned with the info all over the place as well. Here is what I did:
The bumper is attached to the frame by 6 studs/nuts (3 on each side). As it turns out, the studs are about 1" apart. I just moved the bumper up in position on the studs. It's only held on now by 2/3 studs on each side, but is solid (nailed it on a huge boulder and it didn't budge). Not sure if this is what people are describing as "stretch". If I didn't do this, I would have had a 1" gap.