I believe these are about 1000cfm. I don't have an exact number to be honest. They come with mounting hardware, not sure if you'll be able to use it to make it work on the Nissan radiators.
Wiring is just positive and negative wiring, you can wire up a separate switch if you'd like. You will need to cut the stock plug and splice it into the new fan, as this one does not have a plug.