Has to be a "calf rearing" bucket IIRC. They're just having you on, buckets were involved in a flawed idea that was posted a while ago.
Technically the best place to put a CAF is around the scuttle panel/windscreen wiper area. The flow of air over a car body is at it's highest pressure at this point, therefore the air you're drawing in is at it's most dense (which is the whole point - cold/dense air = more oxygen to react with fuel) If you fancy a project maybe you could fashion an air intake around this area without using a silly amount of 90-degree bends or small diameter induction hose.
Otherwise, a CAF into the grill area, fog light area or where the headlamps usually are (which is what the cup racers used) is common. Obviously some are less practical than others...