I don't know about your year but on mine they cut off the back of the van and extended the chassis with 1.5x3' steel tubing. The hitch hangs off of this and it seems pretty subpar for the 4000 lb tow rating. The factory hitch also hangs lower than it needs to...
All that being said, they make universal hitches. They mount to the frame, you will likely have to drill holes, and they telescope from side to side to the frame.
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1998 Dodge Xplorer 230
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