US Indy slots...man I love these wheels...

Man I love these wheels but it seems the only size that may work on the front of my '67 Dart in a 15" diameter with a workable backspace is 8" wide. So does anyone have 15x8's with a 4.5" backspace on the front of their '67/8 or 9 Dart? If so what tire are you running here that isn't rubbing. I also have a front sway bar to consider.
These wheels are:
15x8, 4.5 backspace with +1mm offset and seem like they would fit pretty well however they also make a 15x8, 4" backspace, -12mm offset which I believe would stick out too far based on my FABO research.
They do also make a 15x7 but it only has a 3.75" backspace and a gain confidence isn't high on good fitment.
Thanks gang.