Weeds, there is more to consider than just total weight of the front clip.
The bumper and brackets are heavy by themselves and they are located the furthest from the truck's center. This means that they have a bigger impact on pushing down on the front springs than if that weight was located closer to the truck's center.
I am assuming that you plan on replicating the front clip with sand bags or similar.
Well, that's what I think anyway...
Carl
