Any flex/bend at all will get worse. If you have access to a lathe you can set the pushrods up between centers and straighten them, using a small dead-blow hammer and a dial indicator. Get an overall length measurement- - - -I might have some stashed away that are straight and the right length.
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!