I have a set of supersprings for a truck camper ( 3k Plus pounds in the bed ) , I Don't have Factory Overloads. That is what I should have done. Than airbags as required, ( last 3 trucks had airbags, loved them ). .
The super springs work, well kinda.
I am just asking to much from the super springs. .
My guess is Heavier the better.
But, Suupersprings will raise the bed height.
The Heavier the springs The higher the truck gets when empty ( and also Loaded ).
It just grows Higher and Higher,
( ? If I can remember , 4-6 inches ?)
You will notice the difference Immediately)
Also, on my 02 Dodge ( 4x4) the rear shackle just clears the
bed brace,. . It was hitting untill I got different shackles from superSpring. The install was not that easy...
I did get Excellent Customer support, I had bought the lower
weight springs, they took those back ( small cost )and sent
me Heavier springs, Than they sent me several spring
shackles to get the spring adjusted for my load... .
( May want to call them, Easy to talk to a tech person )
For My application Supersprings were not the best choice.
If you need more info PM me. .