Like 73m819 said the winches you can swap the mounting plates, angle iron and frame rail extensions do not swap.
I have 900 series frame rail extensions and NDT and I spent some time with 809 series plates and angle iron looking for work around. The mounting plates are not wide enough to drill the top holes wide enough apart, the frame rails would also need 5 holes drilled into the frame or 4 into the extensions.
It should not matter for hydro powered winches, however the alignment for the 809 series to get the PTO shaft to the winch does not look like it has clearance.
I am still looking for the correct frame rails, plates, angle iron, drive shaft and cab linkage.