As mentioned, Steele Rubber Co. I had a pair of 1960 GMC V6 motor mounts revulcanized by them for $100. These were very basic rectangular rubber blocks onto a flat plate, so depending on what yours look like will determine cost. Many times there are other mounts, for something else, that can work. Is the mount just a bushing and washer stackup? If we see a pic of yours we can eliminate a bunch of false leads.

Several sites show the 3 hole mount for 235. I guess that is the side mount. Can you switch to side mount? Is 1960 different from 1961 and up 235 mounts? Have you checked 55-59? Anything here?
Most of the time an old part number does not do any good anymore. You have to dig the internet.


Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn