I had a chance a couple years ago to talk to one of my heroes, Tom Langdon. I'm a huge 216 fan, and I asked him a couple questions about building one. He looked me dead in the eye and said,"Why? S**** it and get a 235!" I felt like Ralphie when Santa said "You'll shoot your eye out!" I still want to build a full race California Bill style 216 someday, Langdon be damned! Good luck with yours!
Here is some good info on 235 oiling https://chev235guy.blogspot.com/2015/04/235-rocker-oiling-evolution.html?m=1