Is it worth it?

Welcome to FABO. And as memike has stated make sure she owns it or can get a title to it. It does sound like a great deal for it that is for sure, just depends on how bad the rot is in the frame. 64 was the first year of the Cuda, and the last year of the push button auto.. They are a fun car to drive and pretty easy to work on. Keep us updated on how it goes