Tire\wheels

Hello All

Because of a laziness on my part I was forced to install a pair of 235\70 R 15
on the rear of my 74 Dart.
I have done a lot of reading on here and what size people are putting on there cars.
So with that in mind, here is what I found with the above setup on a stock
rear axle and no mods, there is no room between the Tire and body, I can not
even get a finger between the two. Also when looking at the backside of the
tire, I would say there is not 1" between the tire and the spring.
I've read where 245, have been installed.... ?????
I now notice that making a turn and or going up a driveway the tire rubs a little....
don't like that.
I don't know why the pic is on it's side, not my doing...sorry though.
Best