Help me ID my truck

[rmc115]

I have a titled 49 ad truck that has been in the family for 20 years. I inherited it from my father a few years ago and did a s10 frame swap and made it nice to drive. Anyway, now i am getting into the history of these trucks, my title 14fpkxxxxx decodes baltimore,48, november but I see irregularities. my dad said it had 52 doors, but what I notice is, ureadable vin plate is riveted not screwed, push button door handles and vent wings. Any guarantied way to tell what year the cab is? I am looking at vintage air and evaporator kits are different for 47-49 and 50-52, and also may put the bearclaw door latches in and would like to know what i have, thanks, Mike