I found this great video of the #23 Nissan Silvia Turbo Super Silhouette today. These Super Silhouette formula races were held as introduction to the Grand Championship races. During the 80s these cars inspired a lot of people to copy its style and created the Granchan style! According to sources this particular race was attended by 35600 people, so there should be at least a couple of these spectators who owned a Granchan car copy back then!
This particular footage is located at the Fuji Speedway Grand Championship and shows the victory of Kazuyoshi Hoshino: the driver of #23.
I really love that period music, 80s haircuts and those old original Impul Hoshino deep dished rims!