...In this photo gallery I will detail the steps and modifications to implement a 3-point roll cage, just like the Strahle (914.043.0163) http://www.pbase.com/9146gt/factory_9146gt_race_cars_sn9140430163_strahle and the Earnst Seiller 914-6 GT (914.043.0181) http://www.pbase.com/9146gt/factory_9146gt_race_cars_sn9140430181 race cars were required to implement prior to the 1971 Monza race where both cars competed.