I've seen two types of rear main seals. One snakes over the crank from below (drop the pan) and the other looks like a donut and slips over the end of the crank after removal of the parts you listed. For the
oil to be leaking at the rate you describe would indicate that either the seal is SERIOUSLY compromised or it's coming from some place else like a crack in the pan or a problem with the
oil pan gasket. I lost three rear main seals (donut type) in my previous Windsor, but it was a very slow drip from the bell housing. I developed a more serious leak later on that ended up being an almost invisible hair line crack in one of the seams of my Canton
oil pan. It looked like I hit one too many speed bumps.