72 dart ... now mini tubbed

my wheel tubs are right at 15 inches from the inner fender to the inside of the wheel well arch. I have 12in wide wheels ordered, and I am hopeing to get a tire that is 14 inches wide in there. And I would like to go 30 inches tall, but it will require a little trimming of the outer wheel well arch. At least from the pics I have seen and measurements I have taken.