clutches for a 93 dodge cummins dually

From : ron dudgeon

Q: hi guys i understand there are two sizes of clutches available for this truck 13 and 12-1/4. i have been advised that the smaller clutch has more torque and will eliminate the bucking i experience in reverse when i am hauling my fifth wheel. can any of you good folks comment on this. i need info quickly. btw the dodge dealer here in bc quoted me 1600 for the kit many thanks in advance diesel dan the fifth wheel man .