53 saw several transitions, including the first few full pressure 235s- - - -mostly in Corvettes. Is he sure it's a spray-oiler? The oil distributor on the driver's side makes me think so, but without a complete teardown, it's hard to tell. Does the side cover go all the way to the valve cover, or is it one of the ones with a short pushrod cover?
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!