I would take a sawzall to the crossmember outlined in the photo link, about 3" inboard of the frame rail on both sides, then fabricate a 2" square tubing cross piece that bolts into the remaining stubs. Put enough drop into the new piece to clear the flywheel and bellhousing, and the job should be good to go with about 3-4 hours' worth of fitting and fabricating.
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!