Aw, I am glad you took the time to read my posts! Thanks for the smile, I am always glad to help others who are where I was 2 years ago. I had a million questions and everyone here was SO kind and helpful and made me the addict I am today.
Here is a basic diagram of a snake's anatomy, you can see that the stomach is about 1/3 of the front of the snake and his intestines are most of the rest of him until the rectum. I have noticed that the meal does move quickly down into the belly, and it is usually less than a day before the lump is gone, they digest quickly and then it is a matter of heading through the intestines.
If you are worried, watch for regurgitation, that can happen if the temps are off or the snake is stressed. If that does happen, there is a very detailed protocol to deal with this, again, search and you will find it!