I just went out to look at my center stand on my 79k, I think you would either have to remove the stand or modify it with a stop bumper that would catch the frame. As for the headers personally I would want to fab some kind of support. More for my piece of mind than anything else.
Other folks here may have a better answer though.
Good luck
P.s. on a lighter note...removing the center stand might cut a few pounds off the weight too.
'79 CB750K
Somewhere in Phoenix...Damn its hot
A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed. ~ Second Amendment of the United States