No. It is a direct bolt in and infact is a path to do other things. It is a heavier axle with a larger king pin. It will also allow you to use 49 to 54 car backing plates and break drums giving you a five bolt 4-3/4" spacing, if you decide to go to an open drive line, with a 4-3/4" rear axle bolt patern. It will also give you Bendix brakes instead of huck brakes. It is great upgrade for your truck.


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