I'm trying to trace the history and evolution of the water system in the blocks.
The 15 bolt motors had copper nozzles in the head for exhaust cooling, and according to the factory lit this stopped with the 18 bolt (full pressure oil) motors in favor of simply using larger water passages.
A diagram of a 1953 motor shows no water holes from the block jacket to the head in the front 3 cylinders. Only #4, 5 & 6 have water through the gasket.
However: later gaskets show water transfer through the gasket at all cylinders, but I can't tell from the text or pics if the holes are all the same size?
The gasket patterns are all over the place as well.
Anyone have anything more on this?
