Chips weigh between 500-550# per cubic yard.
There has to be weight charts for cords of wood.
But...the key...how much fluff or air is in a pile of chips v. a tight stacked load of firewood?
YOu can find out for yourself. Fill your gas tank, load up the truck as full as you want and head to a scale. Look for a truck stop weigh station. some state weigh stations leave the scale on even when no one is there. You could drive across on and peek in the window. Then go dump and do the math. if you want to get really accurate you could account for how much gas you burned driving from one place to another. If you start with a full tank the difference will be small compared to the total load.
Rough idea...your 4.4.8, filled with chips would weigh about 2,600#.
Be sure to check the drivers door column to see what the GVW is so that you don't overload.
You can do your own woodchip weight calculations like I did a few years ago. I put in new knives in my chipper so that the chips were nice and uniform. then I used five gallon buckets for sampling. We would stack some logs aside and then blow them into the box. Then I'd scoop up a bucket of nice clean 'wood' chips without brush and leaves. I did this with some oak, ash, elm to get the heaviest chips. Weigh the buckets of chips, subtract the weight of the buckets, do the math. My sampling used five buckets on 4-5 days. That gave me 4-5 averages. When I did the math they all came out soooo close. Even when measuring less dense wood. 500-550#/cubic yard is what I found. YMMV
