The brass pieces are generally re-usable. I bought the kit and wouldn't suggest it. The needles are not the same as stock, the jets aren't the right sizes. The o-rings for the float bowls aren't easy to place on as they are the incorrect shape (right size though). From the kit, I only used the rubber and paper gasket, some of the orings. I cleaned and re used all of the brass parts.
Those carb boots look cool. Would like to hear others experiences with them as well.