When I did my restoration, I removed and kept the vinyl top off. I had to replace the trunk to window sheet metal that had 2 holes in it. I also replaced my quarters so I didn't have to grind off the metal trim piece studs that you will have to.
As far as removing the top itself, it just peeled off fairly easy but it left a layer of glue.
When its all said and done, it looks great and you can't tell there was ever a vinyl top.