What the the Vehicle Serial Number/ID?
What is then block date casting code (is the engine/block original)?
If you do not know where to find it, let us know - someone will post a photo.

What is the engine serial number (pressed into the block to the rear of where distributor goes into the bloock

http://www.oldgmctrucks.com/page0010.html
https://oldgmctrucks.infopop.cc/eve/forums/a/tpc/f/462107036/m/1421093432
https://oldgmctrucks.infopop.cc/eve/forums/a/tpc/f/462107036/m/71520754563

Most likely they would have switched when the old-style "ran-out".

Tim
1954Advance-Design.com
1954 3106 Carryall Suburban
1954 3104 5-window pickup w/Hydra-Matic
The 216 and early 235 engines are not "splash oilers" -- this is a splash oiler.