Well, that is what I am trying to decide. Thanks for the frank opinion! I started reading the Convertible Top book and it says a two part top has a separate rear curtain we would call a window. It is mounted to the frame, not really a part of the top. A one part has the curtain as an integral part of the top. It is usually used on cars with little room like two seaters, Corvettes, etc. My clear plastic curtain seems to be sewn into and part of the top so-- a one piece? And a 'scissor top' was not offered until 1971 on big cars. It uses a totally different mechanism and the point was to allow much more room for rear seat passengers. So the book about them is probably not applicable to us except for generic top installation. Jimc2002 the more I look into this the more I go down the rabbit hole. Right now I am concentrating on getting the hydraulic system working. Then I can see if the frame is working as it should. My rear plastic curtain is gone so I used some table top clear plastic sheet just to close it up. The rest is OK and not in a rush to be replaced. I did not realize how complicated this job is.