Changing Rearends from 7.35 to 8.25

I am going to be replacing a 7.25 rearend in a 67 Dart with a 8.25 rearend.Will the U bolts and shock plates work off of the 7.25 on the 8.25 or do I need to buy some different ones. Can these be purchased new and where If i do need to change them.

Thanks

Bobby