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89 Chevy 3500 Dually question

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Just picked one up from a friend for a song. Has a 454 TBI, 3-speed manual w/granny gear and a 4.11 rear axle [2wd]. Tire size is 235/85 R 16. The door sticker is toast and I was wondering if anyone knows the maximum towing capacity of the truck? I've searched all over the web and can't find a definitive source for the info. If anyone knows of a specific site where I can find it, please let me know.


Thanks, Kelly

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It's got huge helpers on it, power steering, power disc brakes, trailer package with dealer bumper hutch, Gooseneck in bed, 2 bumper hitches in back [really big double decker 3/8" steel plate one]. I am really after the maximum factory number so I can add in the gooseneck and helpers on my own to come up with a maximum. No other load based options on the truck.


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