it looks like your truck stays manly on the road so it would be a good idea to spin the dif a bit but don't go to far or you can starve the pinion Bering for oil
remember if the fill plug is on the front it will raise and if its in the back it will lower so you may have to compensate for fluids
o and nice wheels
that is a pretty sick truck for a nissan. not bad at all. but that angle from the drive shaft to the rear diff dont matter at all, thats what U joints are for! lol