Cab question?

[Jamesbb]

I have a really good condition 49 1/2ton cab. I'm not 100% sure on the year but it has a driver side vent and had a gas tank in the cab. Unfortunately some jerk took the vin plate i guess to complete their project. My question is will this cab mount on trucks from 47-53 with factory mounts? Also does anyone know of anything else i can check to confirm the year? I would go with the s10 swap, but i am afraid of the issues with getting it registered/insured with the vinplate gone.