It's closed now (the original race cars of yesterday/year in Saint pete, Fl) Dave said they would run roundy-rounds with flipped heads on early motors so the water came out the back of the motor. Some firewall cutting was involved. Would guess flow was better. He had drawers filled with race billings going back into the 40-50s, probably lost now. He also supplied the cars for grease lightning with Richard Pryor. Movie about Wendell Scott. Great movie.
He also told me they would put frames up right all around the 1 ton so they could add more scrap on a load to recycle.
https://www.youtube.com/watch?v=B1gUrI4YiKI