Evans waterless coolant

The theory was to prevent hot spots in the combustion chamber by eliminating what Evans called nucleate boiling on the back side of the combustion chamber. This is where standard antifreeze and water would separate from the backside of the chamber on a thin layer of steam. Years ago I had cut apart a slant six head to see where to drill holes and tap threads for 3/8" pipe at the correct angle to target an area between the spark plug and exhaust valve seat to reverse flow the coolant. Never did that unfortunately as I installed a draw through turbo instead..