It's the port just below the oil distributor cover. Once the oil leaves the filter on a 216 it joins the flow to the rocker arms through the water jacket. On a full pressure 235, it dumps back into the oil pan.
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!