If you are referring to a uniformly cut out section, I believe you are looking at the cutout that is required for removing the cylinder. It needs to be lined up correctly to remove/replace the cylinder in the frame - about 3/4" wide and 1/16-1/8" deep.
If you are talking about something that appears "chipped" or non-uniformly broken off, then it's probably not the same though...
The MODEL A engine firing order is 1,2,4,3, which means that the front cylinder fires first,then the second cylinder,then the fourth cylinder,the last the third cylinder.
There should be a label on the engine shroud or on the cylinder head with the serial number and model number on it. The label is usually on the front side.
On the left side of the gun with the cylinder fully open on the frame in front of the cylinder.
Should be the second one back from the front on the passenger side. Driver side from front should be 1,3,5,7 Passenger side should be 2,4,6,8 for the cylinder count.
The model year? Front wheel drive or all wheel drive? 4 cylinder or 6 cylinder engine? More info needed.
4 cylinder should be at the front of engine behind radiator 6 cylinder should be at the rear passenger side at the bottom of engine
Four cylinder it is on the rear of the engine. Six cylinder it is on the front of the engine.Four cylinder it is on the rear of the engine. Six cylinder it is on the front of the engine.
when standing in front its the right front cylinder
Front cylinder on right side. Front means "front of the car."
Front of engine to rear is 1-2-3-4. I posted a link with every specification on the Model A Ford. You may find it useful.
S&W has made millions of .38 Special revolvers- none of them were a Model 367. Please repost with all markings on the gun, including any markings that are on the frame covered by the cylinder crane when the cylinder is closed.
look inside the cylinder housing frame toward the front.