Not necessarily. Your second post asked which was the original size
That was what I was answering.
The 5" are from later cars. I don't know whether they might cause problems with tyre clearance with the narrow bodied car that you have. My '76 (also narrow bodied) is on original sized wheels - replaced by a previous owner a lot of years ago.
Newer tyre sizes may need the extra width wheels though - you need to check whether there will be any clearance problems.
Cheers,
