https://www.google.ca/search?q=280zx+rear+crossmember+insulator&rlz=1C1GGRV_enCA751CA751&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwij6Zb1iLLaAhUHTt8KHUFwDyYQsAQILw&biw=2560&bih=949#imgrc=O2Oqj5JRVSdXmM:
heres a picture with the part number. hope it help