photo 1 - no known/useful information

photo 2 - block casting code = 8337004 = 1955-57 235 block - hydraulic lifters (car engine)

photo 3 - 1955-2nd and later 235/261 valve cover

photo 4 - head casting code = 3836848 = code used on all 235 engines from 1956 onwards

locations of most codes are shown on this page

meanings of many codes are shown on this page

Post your engine serial number and head/block date casting codes - we should be able to ID the year/years.

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.