I have this pkg on my truck and from what I've read it seems as though my truck sits pretty level because of this. If this is not true someone please let me know. If this is true, then what would you guys suggest as far a a leveling kit? I wouldn't want the rear sitting lower than the front. Also, when I hook up my 4000lb boat to the truck I get a slight squat out of her. Would putting bags in eliminate this and if so what do you guys suggest? Thanks for any response.