I've seen several examples of people using 216 pushrods in a 235 engine by putting the adjuster screw locknuts on the underside of the rocker arms. There's approximately 1/8" difference in deck height between a 216 and a 235.
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!