65 Ford Galaxy 500 XL
I had a 66 Galaxie 500 that developed a good sized hole in the frame behind the left rear tire. I also had a 68 LTD 2 door hardtop at the time, thought about swapping drivetrains or frames, but the 68 frame was not very solid either.
My brother had a 66 7 Litre convertible that he sold this spring. Needed some bodywork, a new top and a minor repair on the frame but was all original powertrain, ran and drove like new, even the interior was decent.