Well the top of my motor is the same as the red top one you posted and the front is the same as that other link with the black rocker cover. So going on from what you said, there were two types of these numberless motors and one you mentioned was a TRD pre-production version. (Dumb terms now), when you say pre production, you mean pre 1971 or when ever the first 2tg was made and you are referring to the carby motor only right?