Will any 8 3/4 fit???

Thanks for the responses... I am having trouble finding an 8 3/4 in my area. He said he wanted to use it in his Dart but it was too wide. I'm wondering if its worth going through the trouble of having it shortened? Would i need custom made axel's? Or can they be cut to length? And will I have to go and find my own backing plates? Or will the cuda ones work for me?

Big thanks!!