dually drop kit

I have a 91 chevy dually and DJM has a kit listed that fits the 92-99. Will this kit fit on mine?

I dont think it will. If the DJM kit comes with spindles, the 88-91 trucks used a different spindle than the 92-99 trucks. The coils are the same. Everything out back should be the same to depending on what rear-end you have. 10 bolt or 14 bolt.