Just installed new gaskets on my old 235 high torque, tall side cover also like the 216. Glued the gasket to the cover first using Permatex #2, held in place with a bunch of clothes pins until dry. Then more #2 to side of motor, no leaks.

It's easier to get forgiveness than permission!
1946 1/2-Ton Chevy
1953 Chevy 3/4-ton Factory Stakebed