Remove the rear spring U bolts and slide the complete rear end assembly back on the springs until the U joint disengages. Then acquire the correct universal joint before you reassemble the job. There are supposed to be bolts holding the front and rear sections of the U joint together, not the Rube Goldberg mess you've got there!
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!