Wheels for a duster offset and backspace
I like 15” wheels, too, but I think 17” and 18” give a more purposeful look to the car, 18” wheels are the only way to get some real rubber under the car without fender flairs, and they don’t make modern tires in anything smaller than 17”. Not everybody wants modern radials (i.e. designed before EFI was a thought) but if you do and you want a 275 or so tire on the front in a stock fender, 18” wheels are pretty much your only option. And I am excluding drag radials from the definition of modern only because they really aren’t intended to do more than go in a straight line.
There is a huge thread on here about running 17” wheels, might give a search for that.
Based on the OP’s mod’s, sounds like he is looking for something better than 1980’s hockey pucks.
Best I remember, a 17” wheel is about maxed out at right around 5.5” of backspacing as a general rule. The issue is usually the tie rod end rubbing on the wheel, and sometimes the upper balljoint. Most are going to 18” wheels to avoid that interference, at which time you can run more like 6” of backspacing and a 9” or 10” wheel without hitting anything.
There are better people than myself to help, that is just what I remember. Look up 72bluNblu, he runs a 285 tire on the front of his car.