Pressure lubed 235's had a production run of a little over 10 years, 1953-63. While they're not particularly scarce yet, the newest ones, including "service replacement" blocks, are approaching 60 years old. Try finding a 1st. series 194 or 207 Chevy six from the late 1920's or early 30's these days.
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!