Time for me to buy wheels and tires!! please help me!!

Im looking to buy wheels and tires for my 1973 dart sport. Its has 4 wheel disc with big bolt pattern. Has a street-lynx setup in the rear, a abody 8 3/4 rear-end, stock width, stock wheel wells. i also have firmfeel tubular upper control arms up front (not sure if that matters)

I already know that i have to go with a minimum of 17'' wheels because my front brakes are to big to go any smaller. I guess what my issue is that i know nothing about back spacing or really anything to do with wheel fitment. I know that i want the car to have a good stance, and want to go as wide as possible without them sticking out past the wheels wells.

If anyone can help me with sizing or has and info at all that would help me along it would be appreciated. If you have a dart spot that has 17'' wheels and a similar setup to me could you post some pics for me please??

I listed some 18 inch Forgelines and tires for sale on the form. They are made for a body mopars with big bolt