Tire and wheel questions

I know there's many posts directly related to mine, but after much searching I feel like my question isn't completely answered. I'm looking to get a new tire and wheel combo. Currently running the stock 14" wheels, with some tiny rubbers. I'm going with a 15" wheel, but wanted to know a good size for the fronts and rear. I really would like to have a minimal tire size of 235/60R15, but would like to go taller and fatter. Also not sure about the backspacing as well. Any advice is greatly appreciated!

The car is a 1969 Plymouth Barracuda. One last question to maybe speed this question up, what size should I go with if I were to get this wheel.

http://www.newstalgiawheel.com/shop/product/vn105-torq-thrust-d-satin-black