Yes, the frame is 34 inches... should be the same from roughly 1955-1998. Look on your local craigslist, and if possible dry fit the hitch by holding it in place before buying it.
There are a few other considerations for hitches. Some might have more or less drop than others.
I got the hitch for my 59 off craigslist. I believed it is a drawtite hitch, but the number isn't legible. When I got it, it fit perfectly under the barden bumper. My 59 is a longbed, and the hitch would often bottom out on steep driveways, so I recently removed and modified the hitch to go through the bumper.
