This link shows 61 to 68 I think I seen a 69 one time with one
https://www.retromanufacturing.com/products/1961-68-dodge-d-series-trucks-huntington-direct-fit-radio
Black beauty is made from coal slag its for cast iron and will warp sheet metal a couple of other fourms talks about it. And any experienced sandblaster should know. Too bad it happened to you I would not be too happy either. Maybe you can find another cab with some searching
You may have to do a lot of searching online I have been there many times. Here is a good read on 351 and 400 if you read the whole link
https://fepower.net/Products/feia.html