Help with some sizes

So after lots of thought and research i have narrowed my search to these rims: the Foose Classics Nitrous II. this is a rough look of them on my car:
FOOSENITRIOUS-1.jpg]

Im going to go with 17's all the way around. My question is, how big of a tire can i fit front/back with a stock 73 duster?? I have no clue as far as what backspacing or thickness of tire i can run,i would like to try and get the biggest tire i can get in the back, and something that looks about right in the front. Help is appreciated


thanks

FOOSENITRIOUS-1.jpg

FOOSENITRIOUS-1.jpg