What size 17 in rim will work on 68 Dart Converitble?

I'm in the same process with my 69 Valiant. What I have come up with is 17 x 7 for the front and 17 x 8 for the rear. Now for the tires Front: 205/45 or 205/50 and for the Rear: 245/45 or 245/50. I guess you can guess that I am fan of big and little tires. I just like the look. The Valiant has a spring 1/2 relocation with an Abody rear in 4 1/2" bolt pattern. Wheels that I have been looking at are the AR Rambler package with tires, or the AR Torque Thrust black M wheels. Like them both.

With a wider wheel, you can fit a larger tire in the back. I'd say a 275 at tops.