Boost gauge was pretty simple, boost pipe came from my EGR delete pipe (will differ on your petrol). Then a wire to go to you dash cluster dimmer feed, another to an earth. What ever you do don't go for the steering cowling mount like mine, the squeaking from the steering wheel when turning literally makes me want to set fire to the car
!! There's one you can buy for the O/S heater vent.
Yeah I still have the wind deflector and bars. Keeping hold of them for now, I was thinking of breaking the car when I tried selling them but changed my mind!