The 216 distributor will fit and run in a 235, as long as the distributor gear and the camshaft are compatible. Someone with better information than me will be along to expand on that subject, but it involves a possible mismatch between a cast iron cam VS a steel cam and the corresponding distributor drive gears. The cap and rotor must match the distributor, as there are at least two different heights. A short rotor with a tall cap will result in no spark reaching the plug wire terminals.
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!
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