i have a different wide band set up, but it should be essentially the same. just ground the brain box for it and splice it into a wire that is hot when the ignition is on. do the same for the gauge. everything else was direct connect with plugs for me. but to anwer your question it was not very difficult.
My brother has the Dynojet on his Lightning. He told me to get the wiring schematics and he will hook it up on mine. He told me that there are certain wires that you have to splice into like injectors,mass air, tach, etc.