Yes, the casting numbers pretty much confirm the earliest possible dates the parts could have been made. The low water pump was a mid-year 1955 and later feature, so you've got a fairly late model 235.
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!