8 3/4 U-bolt question

Hello FABO. I just purchased used shock plates and U-bolts for a 8 3/4 rear from a member here. I have a quick question. I received 2 which are flat at the top of the ā€œUā€ and two that are not. I know on my 7 1/4 rear, all the U bolts looked the same (flat on top). Will these work for the 8 3/4? Or are two of U bolts incorrect?
Thanks FABO!

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