you mean datsun shops that repair datsuns or individuals in seattle sometimes willing (for extra money, etc) to provide advice? Looking at internet i could not find that carbs for automatic 620's were any different from non-automatic carbs, but seller suggested it was, but i was in a hurry and frustrated and bought it anyway. Anyway wont fit adapter and someone (not a professional or anything) suggested the scary idea that original bolts on manifold broken. Perhaps unlikely, i need to check it out better myself. Clay