what would have sbp 15" + wheels stock that would fit my Dart?

DarTT said
Nope SBP, just seeing if anything had SBP and 15" wheels stock

I don't THINK that Ma Mopar ever put a 15" wheel on a SBP car.

I had Stockton Wheel build mine. To get the required backspacing I needed, they had to reverse the rim.

Call 'em up; they'll build anything you want/need.

They advertise in the Mopar magazines all the time.