I run 2.5 inch forward on mine even with a shortbox. The half inch side to side really isn't going to hurt a thing, but I am anal enough it might bother me lol. As long as the rest of the install is sound then leave it alone.
Depending on the brand and the rails, you might be able to go out right now and knock the thing over a 1/4 inch. Some really are that sloppy.
1999 Ford Superduty F250 PSD CC SB 6spd 4x4.
B&W goosneck/companion hitch, Airlift 5000 airbags.
2006 Sierra F28 Rear Kitchen 5th Wheel, 31' = 10k pounds.
Nights camped in 09-14, 2010-23