Getting closer to my first trip back to the track with the new motor. The Griffin radiator doesn't have an overflow container at the moment. I would like to purchase one that will also recirculate the coolant back to the radiator (after looking through the Summit catalog, it appears that not all containers do this). Anyone have any recommendations on manufacturer and size (pint, quart, or other)? The final choice needs to be NHRA/IHRA legal.