Just got my 52 speedo back. I had already blasted/cleaned the housing/face etc and took to the "guage man" and he put me a new nos head in it and calibrated it. It now reads between one and two miles.
I used the decals on it just like I did my 37 several years ago and they still look good. Since I'm doing a body off frame I figure I may as well give ne life to the speedo as well.