7 1/4 to 8 3/4 swap question

shock plates can be found in the U-pull it junk yards and U-bolts should be bought new from most auto parts stores or drive shaft shops all most always can make you a set when they shorten your drive shaft 2 1/4 inches, the difference between a 7 1/4 and an 8 3/4 is 2.26" measured from the center line of the rear axle to the center of the U-joint