Use pushrods for a 216, and put the adjuster lock nuts UNDER the rocker arms. The 235 block is 1/8" taller, and the short 216 pushrod will work, but there's not enough room to run the lock nut in its usual position.

These guys will build custom pushrods in any configuration you want:

www.pushrods.net

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!