i would say no. mine never really sagged with two dirtbikes in the back, and that's much more than 300lbs. on the other hand, some people have had different experiences. the only thing you can do is try it. if it does sag, you have a legit reason to ask for the tsb to be performed on your truck. if for some reason they do not do it for you (i don't see WHY they would but..) then you could look into an aal, or helper spring or possibly an air bag setup if you wanted. like i said though, i don't personally think you'll have an issue.
be sure to post up a pic of that setup when you do it-i'd like to see what you come up with.
good luck.
be sure to post up a pic of that setup when you do it-i'd like to see what you come up with.
good luck.
