Is a 295/50 R15 possible?

Ok, Right now I've got (wheels are Weld Draglites):

Front: 215/60R15 on 15x7
Rear: 235/60R15 on 15x8

My plan was:

Front: 235/60R15
Rear: 255/60R15

BUT, do you think I can fit 295/50R15 rears under my '75 Dart Sport? The rear springs are already relocated, and are flush with inside wheel well. I was going to minitub it, but there is no real point IHO if they are flush with the springs.

I will of course have Discount Tire mock up the tires if there is a chance. But if my answer here is "hell no" maybe I shouldn't bother. Currently I have all BFG T/As, but I was thinking about going to Mickey Thompson Sportsman Radials (26x8x15 and 26x10x15 or 26x12x15).