My 340 in my 66 developed issues :-(

That's what happened to my 340. I pulled the plugs and cranked the engine over using a remote starter and oil was shooting out of one plug hole. Turns out that the gasket broke by the oil feed hole and pushed the gasket ring into my #4 cylinder.

That would be great if that's all it ends up being! This is my first mopar, so I'm learning this engine..I didn't know there was an oil feed hole.. How are the cylinders numbered on a mopar? What is the firing order?
Thank you