You guys are a great help and as I can see will be a valuable asset as I get this motorhome back in shape. As I originally posted, I think the original owner left the door open, it was damaged, and replaced with a door that is not an exact replacement (I will post some pics this weekend). I think the door he put on was the original width/height, but in order for me to install a door with the radius corners I will have to cut above the original opening approximately 4 inches in order to not have holes that would need to be patched...thus my questions.
The structural image was a big help and makes me feel better about cutting above the door only and modifying the top.
I will take pictures and keep you guys posted on my progress...many thanks and Happy Fourth of July coming up!
