I too have a 1963 Hi-Lo. Mine is the small 9.5 foot version. I am in the process of restoring mine. It is not in too bad of shape, just some minor water damage and year of neglect.
So far I have replaced the interior wall on one side and evened out the cables for an even lift. This summer I plan to paint the outside and wall paper the inside. If time (and money) permits, I might re-tile the floor too.
I will take pictures soon.
I absolutely love my Hi-Lo. I have yet to find a better layout in a small camper.