Greg, the first photo the OP posted shows a low water pump engine, and the late casting/high water pump engines didn't have the full flow oil filter plumbing. I believe he's got a late model "crate" engine in an early bus chassis, probably a replacement for a spray-oiler 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!