It looks to be a 52 from the build date.
I'm not a fan of the visors on trucks but that truck needs to keep it's visor as part of it's whole look.
What are the plans for it now that you have it? The bed that is on it looks like it can be controverted to cash at the scrap yard or parts of it could be used to build work benches or other shop equipment.
This one was at Billetproof North West last month
It was a bit rough around the edges but I have the feeling that it is used almost daily as a working rollback car hauler. It also shows why trucks need the real deal visors if guys intend to run them.
I could see it with a really nice flatbed on it, set up with a chassis mount camper on the back or with a ramp bed or roll back bed. I'm still pondering what to do with my 51 1-1/2 ton standard cab truck but a rampbed is looking like the way I will go with it if someone doesn't fall in love with it first.