Help with Wheel and tire combo please!

Good evening folks,

I'm needing some assistance with wheel size, tire size, and backspacing. I've got a 74 duster that is currently sitting on 14" rims, the car definitely needs some meat under her. On my last duster I put 15" Cragar SS wheels, and it looked really good. I think on this one I would like to go with a more modern look. I've read through about every single thread on this forum, and I think i'm more lost now than before. I know I want a staggered wheel, but I don't want to alter the car to get the wheels to fit.

What is the largest wheel you guys are running that you allows for a decently meaty tire?

What back spacing do you guys use front and back?

How wide of a wheel/tire can you put in the back? (8.25 rear)

Does anyone have any pics of 16", 17", or 18" wheels on their duster or dart sport?

I know this topic has been visited several times in the past, but I appreciate the help.

Scott