73 Duster - Need Help

Hi all, new here, been reading the posts but still need some input.

I have a 73 Gold Duster, standard 5:4.5 bolt pattern.

Here's what I'm contemplating:

Rear: 15x8 rims with 4" bs (Cragars)
295/50/15 Goodrich T/A

Front: 15x7 rims with 4" bs (Cragars)
205/60/15 Goodrich T/A

After reading other posts, it sounds like the front will work. I'm still a concerned about the rear. I am planning to put air shocks on the back to raise it up a little. I saw a car listed on Ebay with this set up and it looked nice, but he didn't specify if he had made any modifications.

Anybody running this set up? If you have any pics (especially from the rear) would like to see.

Thanks!