8 3/4 swap on 69 dart

would like to put an 8 3/4 rear in a 69 dart. Looking for advice or tips on what all problems people ran into or things to look for. Is there many or any modifications? Thanks guys
If you find an A-body 8.75 you will need the correct U-bolts and lower spring/shock plates,
drive shaft may have to be modified or changed do to the different U-joint/yoke sizes, e-brake cables not sure on that one as I went with disc brakes on mine, brake lines are the easy part.