The floor of most other replicas
picture - With most of the other replicas, you get "dune buggy" contruction. That is, a fiberglass floor that incorporates trunk, engine bay, fender wells, and dash-all made from fiberglass. Then you take that piece and glue it to the outer fiberglass shell to form the entire car-just like a boat. Is that a bad thing? Well it's simpler and faster to build than riveting 40+ aluminum panels to a steel space frame like the FFR but it's not the way race cars were or are built today. And its 500 pounds heavier with less structural rigidity than using aluminum panels.