The 235 got a pretty major upgrade in 1954, and stayed more or less the same through the end of its production run in 1962 (63 on some models of truck). Just about any service manual that covers those years will provide the basic specifications and procedures for servicing and repair. The 54 and early 55 engines are somewhat unique- - - -they use a different water pump design and position on the engine block than later engines. There's also some difference in the oil galleries and rocker arms on engines from 57-62.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!