I drive my CJ a LOT. Probably more than it should be. It has rusted out floor pans covered with aluminum sheeting, rotted out hat channel, leaks oil and trans fluid, and gets the floors so hot it feels like the heater is running on a summer day. I'm afraid if I ever tore into it I'd be over it pretty quickly if I couldn't drive it. It's really a big pile of junk but how many other 1966 Jeeps are running down the road with the original body, frame, and drivetrain? Heck, I still run the original oil bath air cleaner. I don't mind working on these things, but I only work on it to keep it drivable. In your case I'd do a feasibility study of how much it would cost and how long it would take to get the basics accomplished so you could enjoy driving it. If it's too expensive or too long let it go. It's a toy, not a job.