Unless in the 50’s he had a way to prevent fuel from entering those cylinders when no spark was present all he gained was rough idle, lack of acceleration and possible odor with a noticeable lack of mileage . He may have been smart enough to do it. I deleted the step down cylinder on my truck for fear of camshaft and lifter issues Chevrolet was having. The little bit extra MPG wasn’t worth it.I appreciate Swampratt’s efforts to tweak a little more savings/efficiency. It reminds me of my family and the time in which they lived, always looking for a way to save or get more usefulness out of something.
Dad told me that his best friend in HS (would have been the late 1950s) was playing around with getting more mpg from his old vehicle. Well, Dave decided he didn’t need all the cylinders firing to get around town and pulled the wires and plugs from the cylinders he didn’t need. If he had to go somewhere that he needed more power, he’d just stuff the spark plugs back in their holes and reconnect the wires. Dad said you could always tell when Dave was out driving because of the unique sound. Dave turned out to a real out of the box thinker and inventor during his life.