Have you considered using longer bolts? Most frame shops can do the crossmember correction with about an hour's labor time or less, once the machine setup is done. Any Grade 8 bolt would work to attach the cross shafts as long as it's the right diameter, 1/2" I believe.
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!