OK- - - -you can use solid pushrods of the correct length, or the slightly shorter, but more easily acquired 216 pushrods by the work-around I mentioned of putting the lock nuts on the underside of the rocker arms. The website I linked can fabricate new pushrods, either by using their online order form, or maybe sending them an example to duplicate. They're located in Redmond Oregon- - - -maybe somewhere close to you? Good luck!
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!