I've seen a 1951 titled as a 1952 and it was legit.
The truck was built in 1951 and sold new in 1952. Dealers can't do that today.
The side hood emblems are different (54 and 55).
Block casting year (covered by the starter), head casting year (underneath rocker/valve cover) and engine serial number year.
You want to keep good records of what you find in case you want resale in the future.
FYI:
https://www.motortrend.com/how-to/1003clt-chevs-of-the-40s-3-55-1-ring-and-pinion-swap/
click on see all 32 photos.

"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."