I'll admit to being a little fuzzy on the early stuff even though I have a 64, but do you have square door openings or the curved ones? I don't even know if that makes a difference for the top, come to think of it.
I have a later (like somewhere between 68 and 74 I think) hard top that I sometimes put on my 64. It fits the tub edge fine and the windshield is fine, but I had to trim the deflector for the wiper arms.
There is a fitment issue with later tops and earlier doors, but I don't remember the details. Someone else may, or do a search.
HTH,
Eric