73 Dart - Rear Tire Size

I had my 73 dart mini tubbed and plan to have the 8 3/4 narrowed as needed to accommodate tire size. I would like to run a 15x10 rim and Nitto 325/50 R15 Tire. I would like to buy the tires so I can give them to the fabricator to properly size and cut down my rear end etc. Of course once I buy and mount them I own them. Does anyone see a problem getting that tire under there?
Thanks for the help,
Gregg