A 216 with any oil pressure at all at hot idle is a rare bird indeed! That's the reason for the oil distributor- - -to assure the bottom end gets lubed, even if the rocker arms don't. Those dipper troughs in the oil pan are there to keep the rods lubricated at low speed, idle and slightly above before the nozzles start squirting a stream across the pan for the dippers to hit as they're at the bottom of the stroke. It's possible to adapt an oil pump for a late model Chevy six (194-292) to a 216 which will almost double the pump volume and give a noticeable rise in oil pressure.
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!