Click this
LINK to view pictures of TV replacements.
This is a link to TV replacement on Winnebago RVs and it contains lots of pictures.
Some people on this link take the easy route of putting in a 2X4 and mounting their TV mount on the 2X4. Others take the route I took and turned the space their old CRT TV used into cabinet space and mounted the new flat screen TV in front of the new cabinet space.
You will be able to look at lots of pictures from lots of TV replacement projects and pick something you like.
Here is a link to pictures of my TV exchange project.
Safe travels.
JD