good luck! This is something i can like, get inspired by a build, and use this inspiration to make a plane of your self. Just remember, also the Bell & Ross plane was never made, it was just a image rendering to use in the companys public relations. Was it any racer plane alike it? No, but some of other racers design elements can be found in the Bell & Ross image .
Its an idea made out from inspiration by the racerplans from the 30´s and 40´s , + neuwer ones.