6 10 if it is in the path is too low.
7'6" is again too low to remove the bridgeport assembled, it will have to come apart.
The head and horizontal ram will need to be removed , at that point taking the table off would be a good idea.....
you are into a project. Riggers may be able to do it without disassembly, but the egress would have to be large enough.
What kind of lathe?
I don't see the pics of the lathe, but that's because you probably don't have permission until you have posted 4 times I think.