74 duster 8.25 swap into 65 Dart 7.25?

So here’s the deal. I was hoping to get an abody 8.75 made out of unobtainium but someone has offered me a free 8.25 diff out of a 74 318 Duster to replace the whiny 7.25 in my 65 273 HiPo 4 Speed car. I think this Diff would be more than adequate. The info he has says the spring perches are the same and should bolt up but the overall width is 1.8” less. The 8.25 appears to have 2:94s so it’s the carrier I want. It will require the driveline to be shortened and balanced. I don’t know the condition of the gears. It has LBP drums on it (which is fine for me) that I’ll rebuild.

Has anyone done this swap? Any problems I need to watch out for? If I get it I’ll need to get LBP wheels to replace the 14” rallyes on the back. Is there a particular size wheel that would fit well considering the width of the diff? Would 15”X7”x4.5 work? What tire will fit without modification?