Hi John, all 150's had the rear weight...it even has a cutout in case you install a pto to the rear. The weight is Very heavy, and without it, when you step on the brake, you would probably break the windshield on the pavement. Also be carefull if you take your truck apart. With my truck on a frame lift, the box off, and all the doors, glass, and seats out of the cab, I could lift the the back bumper with one finger....and the weight was still in the frame!!! Good Luck!
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