if im not mistaken, isnt the 216 engine the one with the 2 studs in the top and the 235 has the valve cover bolts around it?
All 216 engines and all 235 engines through 1953 used the 2-bolt valve covers.
And, it is quite easy to adapt the later 235 heads (and all 261 heads) to work with the two-bolt valve cover:
adapter kit.
