Thank you everyone for the fast feedback!!
Jim ... I can understand about having all of the small parts that I might need for the project. For me to drive to town, get the parts and return is about an hour and a half (if you don't get sidetracked by something else).
Oldfart ... I would love to hear the long version! You sound very detail minded as I try to be. Alot of the items you mentioned, I have around the house. Those that I do not, I will get. If I was repairing it in a site built, I would know exactly what to do. I am learning about the MH repairs. Please keep the fairy away from my place when I embark on this repair.
Brenda ... thank you for the link. I had found it once before, but could not find it when I looked last night. I LIKE pictures, helps me visualize what people are talking about. The toilet I want to buy has a 12" rough in. If the center of the flange is to the center of the hold down bolt ... then mine measures 13 1/8" from the back wall.
My toilet is in kind of a cubby in the bathroom measuring 30 1/8 X 28 1/8". On the right side is the heater accessed from the hallway and on the left is a closet for the second bedroom.
I will try and get my wife to take ALOT of pics so that they can be posted on the site for future reference.
Is the flange the same as a site built or is it a special one for MHs?
How do I tell the difference between Schedule 30 and 40?